This account has requested that users sign in to view their profile.
Meanwhile I can read other Bluesky posts without logging in. So yeah, I'd say it looks like robpike is explicitly asking for this content to not be public and that submitting a screenshot of this post is just a dick move.
If there was something controversial in a post that motivates public interest warranting "leaking" then sure, but this is not that.
He did share a public version of this on Mastodon, which I think would have been a much better submission.
By "not publicly viewable", I mean that bsky.app (like Twitter) seems to demand login before showing the post. I don't see any sign of Pike restricting access to it.
He set his posts to be viewable by bsky users so long as they are logged in, knowing that anybody can sign up and do so. (I have chosen not to sign up; thus my original question.)
The obvious reason one might do this is to allow blocking specific problematic accounts. It doesn't demonstrate an intent to keep this post from reaching the general public.
So I still think your rush to flag was unwarranted.
BTW I think it's preferred to link directly to the content instead of a screenshot on imgur.