Apps having their own image picker is annoying.

I hate when apps don't have option to upload image by picking the system picker but instead show their own picker which sucks, you can only pick recent ones otherwise you need to scroll down, there is no search option or any filter at all, just allowing system picker is better, it allows all kinds of searching and Google photos picker also allows searching by dates, faces etc. No point reinventing that, I hope it becomes mandatory to only use system filepicker like it's in web browsers, this can also avoid giving access to entire filesystem when you only need to upload one image.