When being contracted for security audits on codebases, I have found it to be completely the opposite, that the C and C++ codebases have far more troons working on them than rust codebases, it seems for every 5 to 10 C++ codebases I have to interact with one, and most companies that do any kind of "embedded" anything will have one that I have to interact with.
I have audited way more C++ and C codebases than I have rust, so that might be due to sampling bias, but for rust codebases, it has almost always been Chinese expats that I have interacted with, and not the square-headed consent accident kind.
In my opinion, the "rust tranny" meme is almost entirely an online thing, and it appears to be more of a cultural filter than anything else (to filter you out, chud). It clearly works since lots of people hate it purely because of that and not for any real technical reason, or where technical reasons are raised, they are usually done so after either directly complaining about online troonism, or indirectly at "woke" "authoritarians", or in other words, after they have decided they don't like it, post-hoc reasoning. There are still genuine technical criticisms to be had, but they are obscured by the sperging about troons. The online tranny phenomenon is very loud and exists across the entirety of the "open source" software world, it is not unique to rust at all. I'd say there are way more "infosec" troons out there than there are rust troons from what I can see being in both the software and "infosec" (I hate that term) industries.