You should avoid using security-critical tools written by people who don’t understand security, regardless of language.
The fact of the matter is that the novices have always been drawn to the 'hot new technology' and it is unlikely that Rust, being today's 'hot new technology', is the exception. Indeed, Python and Javascript had time in the sun when they were considered hot, and novices were attracted in that direction at that time, but time continues to march forward.
No they don't.
The vocal majority of Rust users are especially vocal in tech circles right now, though, because of it being the "hot new technology" and thus most attractive to inexperienced programmers. This does make their inexperience stand out in an especially prominent way. All "hot new technologies" have gone through this pain period.
That doesn't mean that there aren't experienced Rust users, but experienced users have no reason to talk about it. Their experience has already collected everything that could be gained through vocalization. Talking about it becomes boring at that point.