You are Absolutely right at these points! I agree
You called it social media platform, That's why people were/are sharing their short contents like jokes/photos etc normally as they share on other social medias. And here comes another group of people flagging every such posts stating shitty reasons like less content/no text/high rewards etc. If those were really the cases then they should have called it a content sharing platform/blogging platform, set some rules about content length,type,quality etc and run that way.