What phone/camera?
Your pictures 'file' is configurable to operate how you would like it too.
1/. it's not a file, it's a folder(or directory). Be sure to understand the difference. Your photo of aunty Doris is a file .. .jpg .bmp .nef ... these are files. Files have extensions after the dot. 
Folders have 'no name' as such(more specifically no extension). You can right click the folder and do stuff to it. 
By default the 'Pictures' folder should be set to operate as an image repository .. ie. optimised to show pictures. So, it should be that it shows thumbnails of images. This won't make any difference if there are subfolders within the Pictures folder either. 
2/. you need to supply more details if you want assistance. We can offer many various tips on how to change things, but it's inefficient to offer a myriad of suggestions where we have to guess what computer operating system, what phone(and software), what camera(and software).. .. ie. what software is used to do things. So always explain that you have ... blah blah .. this and that .. hardware/software .. etc. 
I'm a bit of a photography geek, so can offer some tips on how to store your files if you like. I can give you very detailed tips on a good way to manage your photos if you like, it'll be a tedious reply. 
To keep it simple best way to manage photos, is via date and then location. 
Assuming your computer is a PC/Windows 10 then the 'Pictures' folder is located on your C drive, Users, YOUR NAME, Pictures.
By default there shouldn't be a 'Photos' folder. As you suggested it's an added folder due to some software you use. This could be due to your cloud software or your camera software or your phone software(see point 2/. above) 
It may also only be a link(this Photos folder) .. not a physical storage location.
I think(can't recall exactly!) Photos could be a product of Windows built in OneDrive system too .. just can't remember. I remember having it, I deleted mine .. too much flotsam.
The other thing here is that Windows has a built in photo viewing program called Photos too. Is this Photos issue that you are having, possibly that you are using the Photos app in Windows to view your photos?
The only reason you can't get rid of the "Pictures file" will be because some process has a file(or folder) open in it. 
eg. Say you use the Photos app(in Windows) to view some photo. The photo that is displayed in Photos, will most likely be a file stored in the Pictures folder, in one of the sub folders with date names(as you described). That photo is now locked by the PC. They're not locked all the time, only when the file is in use. You can't delete it until you fully close the Photos app. This is true for all similar processes in any software, so it's not specific to the example I described here. Anyhow, I suggest you don't delete the Pictures folder, this is the physical location of the files themselves. Also if you do delete this folder, some other program may create a new version of it because this is the only place it has been programmed to store pictures! SO you may delete it, but it may also come back again later. 
Any file(remember, has a name plus .extension) can be emailed. 
What software are you using to email? If you use Windows built in email software, I can't help. (I use Thunderbird). 
If your instance(or example) of Photos is a physical location, and not a program or link, it has to have a location address. 
In this Photos thing you described, open it up, and go to a picture/photo/file. Right click and what options does it give you in the popup box?
If it has two options at the bottom of the list to 'open in Folders' or 'Open in File Explorer' .. then this Photos thing you describe is the built in Windows app called Photos .. not a folder, not a file. 
If the 'Photo' thing you describe is a OneDrive hangover, apologies I can't remember how it works, I deleted all this flotsam long ago. But if this was the situation, it makes no sense why you can't email a photo directly from that folder. 
I'm curious (for you) as to what the issue would then actually be. 
Try a test: in your Photos thing .. right click the file, and in the list of options, does it have a 'Send to' option in the list? If so, in that 'Send to' option if you hover over it, it should have sub options .. send to another location, but also send to email(recipient). This is a quick and easy way to email a file(any file, not just photos).
So, right click .. Send to .. email recipient .. will open the file(in your case photo) in your email program(whatever you use). 
Not really much more I can add without more info.
				
			 
			
		 
			
				
			
			
				Arthur.
All these discos are giving me a heart attack!
'99 D1 300Tdi Auto ( now sold :( )
'03 D2 Td5 Auto
'03 D2a Td5 Auto
			
			
		 
	
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