I haven't seen any evidence for that, but I've sure seen it claimed a lot.
I 100% agree with you on the quality of information here vs. there. It is much, much more strictly moderated. But with that moderation, that subreddit does not recommend going out and getting COVID in lieu of a vaccine. Even if initial response is better for COVID.
COVID + Vaccine is by far the best, but that doesn't mean you should skip the vaccine to make sure you go the 'rona frst.
Vaccine + Vaccine (and maybe + vaccine) is, by far, the safest combination for pretty much everyone people.