Why is a profile customization, called Profile Picture at it, under Account details when it should be under the Profile tab with all the other profile customizations and personal images?
Easier to find is my guess.
I disagree for reasons I already stated.
Because it puts a “face” with your name, username, email address, etc. in your account. Your profile photo (or other image) also gets used as your avatar. Sort of like the face of an ID card.
Your profile has all the “extras” about you: a short bio, location, time zone, and whether or not you want a profile header and background image. Sort of like the backside of an ID card containing “extra” information.