Why is that scary? It has decades of real life testing applied to it if there were any obvious bugs they would have been found by now.
Assembly is just another language, it is slower to develop in but there are many examples of high level language issues that are at least as scary as what you could do in assembly. In the end it is all about the processes around your development as much or more than it is about what language you pick. The best way to reduce your chance of bugs is to reduce the size of your project.
https://www.mayerdan.com/ruby/2012/11/11/bugs-per-line-of-co...