Yeah, most people wants an easy migration. If the interface was nearly identical to Twitter, there’d be a flood.
In what regards what normies would use of the featureset, they are identical tho - pretty much everything is identical these days. Log in, go to your timeline / flood / jeep / whatever, click “post new”, copy-paste a meme, hit toot / blarg / weep / whatever. There. Done.
99% of people use the exact same 1% of the features of a service.
Misskey has a more similar UI to Twitter, and it can’t even get noticed by fediverse users.
But hardly anyone in the Fediverse, next to no-one on Mastodon and literally no-one outside the Fediverse knows that Misskey exists. Not outside of Japan anyway. Or any of the Forkeys, for that matter (if you’re a Westerner and neither an otaku nor a weeb, Iceshrimp or Sharkey may suit you better).
For more Mastodon users than not, the Fediverse = Mastodon. And outside the Fediverse, hardly anyone has even heard of the Fediverse.