It’s a fad like valley girl ditzoidism. Moving in herds; speaking in herds... They repeat the same phrases, too.
Had a girl over who my son was dating. She did this low garbled thing with a question mark after every second or third sentence.
About drove me nuts, but as my husband says, it’s a short trip.
I try to correct girls and sometimes guys on that.
* You’re allowed to make factual statements without requiring a consensus. Say what you saw or did, without adding the verbal question that they agree with your version of reality.
* You are allowed to state your opinion without asking the “is that OK?” question tone to seek approval for your opinion.
* It gets worse when person to person conversation seems impossible to get concrete, direct answers. It all has to be vague, non-committal, “could, would, might want to”, not “I want X”. As if making a “I want X” statement is offensively harsh. Yet these same individuals can spout absolutes “this is bad, this is wrong, this is evil” in an online conversation.