Why are people so rude about role speculation?

This is a rant but I can’t help but notice that any role speculation for any character is always met with duelist mains saying “No that character is obviously duelist stop forcing things that don’t make sense” and when characters are revealed as duelist they say “This was obvious you guys need to stop being delusional”. God forbid vanguard and strategist mains hope for a character. Even the characters we DO get like Ultron and Gambit they’ll say should have been duelist. I’m tired of the condescending remarks regarding roles. Unless it’s someone saying something like Juggernaut should be support I think anything else is fair game to speculate on.