let me give an example first:-
suppose you have 100 pics that u captured with xiaomi devices now you want to showcase them so according to you u'll create 100 threads means single thread for each pic right ??? don't you think that just look akward if each n every member start doing the same within a short period we'll be having millions of the threads and most of them with single pics.. a user who wanna see your work will have to open each thread individually does it really make sense ??
if there is any rule, that would have been made to make things easier for all of you. hope you understand my point