It’s not just that C is hard. I can wrangle together pretty much any program in C since I used to program in C about a decade ago. However, having been so long, my greatest fear is that I wouldn’t even be aware of the footguns I have introduced in my code. C is littered with best practices which are absolutely not obvious, and unless you follow them can be massive security risks. And to a slightly lesser extent the same is true of C++ as well (although my friends tell me newer versions of C++ are much better at this. I worked with versions prior to C++11).