Writing in that manner in a blog post would be taken more poorly, as we generally have higher structural expectations of “a blog post” than we do of “a Twitter thread”. Simply writing one paragraph per tweet into an append-only post would not be equivalent.
So the readability might improve for removing Twitter’s UI, but then the content would be evaluated as an “essay” rather than as a “stream of consciousness”.
The problem here for readers is probably not the tweeting but the rambling in the tweets (incoherent text)
[edit]
someone posted https://threadreaderapp.com/thread/1135354815259656192.html elsewhere in the comments, and this is perfectly readable for me.
The only difference I see are expectations, in a blog post, I expect edited content that flow well, while on Twitter, I don't expect much.