I would unfortunately say no. As an example, the top-level posts has 8 links, and that doesn't even cover them all, such as the build guide. The links are also spread out, where one is even a blog post.
I have also wanted many times to attempt to improve the documentation, but I never made it past directly editing in GitHub's web interface or suggesting improvements in a comment in a GitHub issue. Even then, I felt I had to prod a little to get those fixes in. I think that as long as there is not a clearly documented process on how to non-trivially edit the documentation, it will remain the case that only core people will be able to or will do it, but they are not the primary use case of someone finding documentation unclear, incorrect, or incomplete. I have been able to fix things in F#'s documentation rather straightforwardly.
One should also note that Racket is split across multiple repositories, and it seems to me that only the racket/racket repo gets what attention there is. Others, like maybe racket/gui, can be a bit of a ghost town in terms of activity and triage. I will say that Matthew Flatt has been very helpful fixing (non-trivial) issues, but he is obviously super busy, although he seems to be the main one showing up to fix things. I get the impression, whether it's real or not, that if he does not see an issue post and fix it, then it will basically go stale.
Lastly, I just don't see much activity on the issue pages from people knowledgeable on contributing. Maybe I should push through more, but I find it a bit intimidating both socially and technically, to contribute. I was even told once to basically not post in the issues on a bug report and instead ask questions on the mailing list, even for things that are bugs.
I was trying to go all in on Racket for a project, but I personally lost a lot of steam. With the above issues coupled with the complexity of the GUI toolkit, lack of clear documentation, and bugs in the toolkit, I just lost steam. Also, with Rhombus looming overhead, a question pops into mind asking if it's worth it to invest a lot of time in Racket.