It should be pretty obvious that security is not solely the responsibility of your compiler. I mean, if your OS is compromised, in can inject code into whatever

It should be pretty obvious that security is not solely the responsibility of your compiler. I mean, if your OS is compromised, in can inject code into whatever you're running, whether it be rust code or not. Anyone trying to make iron-clad systems needs to understand the whole system. But if you're not trying to do that, it's nice that you don't have needless and easy-to-avoid weaknesses like those your compiler could prevent.