Of course if you're doing citation for your paper the later one would be better but this is "just" posting on HN. I would even go so far as to say I prefer the tweet link so I can easily retweet, and no information is lost.
> Please submit the original source. If a post reports on something found on another site, submit the latter.
It's not usually useful to debate what's "proper". Debating utility is a better use of everyone's time, as you point out.
Now if you try to post a Nitter link on HN, it changes to the Twitter link. Why not sure.
Can you please explain what you see that are "hostile"? I opened this tweet RN in a guest profile and it looks exactly the same as the one I saw when I logged in.
"See what’s happening
Join Twitter to get the full story with all the live commentary."
And you have two options SignUp, Login, or F#^&^#@&^ :-) Now if you don't see it, because you have script blockers, that is a recognition of the interface hostility.
"Twitter disables browsing without an account" - https://www.reddit.com/r/assholedesign/comments/p62que/twitt...
However, even if Twitter didn't have a history of such problems, having to click an extra link is annoying to the majority of users, which is part of why the HN Guidelines say to always link to the original source:
> Please submit the original source. If a post reports on something found on another site, submit the latter.