I think it's impossible to tell because there's not enough people who are smart enough to prove that who care enough to do so AND who enough other people will believe. For example, half the people I ask consider Whonix dev Madaidan (and his thoughts on OpenBSD security: https://web.archive.org/web/20220227172102/https://madaidans...) to be wrong, while the other half think he's right. There's no majority consensus because everyone thinks they know better.
Madaidan is a bit of a mixed bag in my opinion — they are probably mostly factually correct in their statement about everything in my opinion, but it seems like they are deeply unfair to Linux (praising other OSes for things they've barely done and then criticizing Linux for barely doing those same things) and have fallen for the flatpak FUD. In the case of their opinion on obsd, I think they seem correct, and their opinion lines up with the other website criticizing obsd so there's that. But you're right, it's hard to know as a layperson.
That's not their reason for believing that obsd isn't as secure as claimed or that their development practices are bad, however, that's just their reason for not directly coming to the obsd developers with the issues instead of just making the problems public for other people to make their own choice about.
And it isn't about the politics of the obsd developers, as I would have thought that website would have made abundantly clear, it's about the fact that the obsd developers are extremely prideful and unwilling to listen to other people's input and have crank-like is used concerning security according to most security professionals, so it would simply be unproductive to come to them with these issues.
So your attempt to insinuate that this website is purely dunking on obsd because their community is insufficiently inclusive or progressive or whatever and has no actual technical merit to it is simply wrong and misleading.
