I see this not as a shortcoming of Mastodon (the platform has other, more organizational, problems): The short outburst-style tweet culture on twitter was a big factor in it's use for radicalization. Sure, just venting about some technical issue was cute - but that cuteness was quickly gone the moment someone started venting in the same style about politics or culture - which then very quickly got misunderstood (sometimes willfully) because lack of nuance means lack of context - and ensuing flamewars.

You *can* say something meaningful in under 140 characters. But putting some thought into that is too hard for many users.