Comment by 29athrowaway

You can make a living as a frontend dev without having to touch those topics much.

Other devs: desktop app devs, mobile devs, backend devs, devops devs, network devs, data scientists, game devs get exposed to those a little bit more.

If you are interested in learning a lot of those at the same time, write a server in C.

https://beej.us/guide/bgnet/html/multi/index.html