Yeah but then you go in to interview at these places and someone who only programs javascript or python will ask you to answer a contrived whiteboard question by hand that involves manually writing out verbose C++-isms like "std::unordered_map<uint64_t, std::string_view> hashmap;".

I went through a day of interviews at Facebook once where not even a single person interviewing me worked in C++. A lot of the interview cycle consisted of me answering basic syntax and STL questions or clarifying my handwriting which made it extremely difficult to finish the problem in the allotted time.