This is true of any language. Python with flask vs django, with/without type hints. JavaScript with anhular and vue.

The varying standards are no different to major python versions or go versions - arguably there’s even less between most versions than there is in your average go release.

The differences in apps and frameworks don’t matter for day to day - std::string, Unreal’s FString and QT’s QString all are similar enough that 99.9% of the time.

Metaprogramming is one of those things; you either write it or you don’t. Knowing some basics is required but the vast majority of people use a handful of pre existing things without understanding the nuances of how it works under the hood.