No, it’s because if someone makes an account for just one post, they’re most likely trolling, banned from the community on their main account, or just have such consistently terrible takes that they always get heavily down oted and they care too much what people on social media think.

If you stick to the same account and keep posting, people will block you, which gradually increases the amount of people who see your post and agree with it.

If you keep making new accounts to complain about shit, the same people are going to keep down oting you, because they can’t block you.

It’s really not complicated, but a very very small amount of people just can never understand it.