Because it's annoying and there is no point, unless you're testing colors.

maybe because people think it's not original but boi look at the animation meme community at this point who gives a shit

it isnt

it can get in the way of other artworks

i dont think it is tbh

Not original

Only repost if there is an actual purpose other than showing of your art. You do that in your first post of it. Not you 12th post. Like fixes and additional features