I majored in math and have so far a great career in software. I don’t think knowing math separates me out from CS grads generally. However, math majors largely chose to major in Math because we like problem solving. Plenty of CS grads major in CS because they are expected to. Being a passionate problem solver gets you pretty far.

Imgui, because it makes dev/debug guis ridiculously straightforward and easy to create.

It’s honestly not that hard, the language was made to be simple. The complexity associated with the language largely has to do with the legacy applications the language supports. If you look at a greenfield project (eg CHADstack (it’s a joke project, but pretty fun to get exposure to some esoteric stuff for a couple hours)) you’ll actually pick the language features up pretty quickly.

C++, I am a library developer with some embedded experience. I can easily interface with c libs and expose my lib with a c interface. With clang, static analysis catches most bugs before runtime. Everything I write can be compiled nearly anywhere with very little dependencies required. Excellent IDE and LSP support with a ton of documentation on the language features available (admittedly, there are a lot). The standard library is gigantic, useful, and well documented. It is used everywhere, so resources and example source code in C++ are very easy to come by. Project configuration (via CMake) is extremely powerful and expressive (though not technically C++).

Some languages have some of the elements I listed, but no other language has them all.

You can read more into Karl Popper’s Paradox of Tolerance if you want to harden your philosophical position for what you have described.