It’s pretty inherent to the tooling around the language. Basically because theres a lack of “standard” tooling, so you either go lowest-common-denominator (header only), or you have to fuss with very gross build systems that have weird quirks on different platforms.

C is easier in this regard just because the language evolves so slowly that even though the build and library systems are bad, theyre a known bad that people can work around. No such luck with C++, where its bad and ever changing.