@bart perhaps you’re over indexing on one word out of 1000. The point is that these tools can teach you transferable knowledge and maybe you’ll find a job doing them. I’ve not seen or heard of many places actively hiring for Zig developers but I also haven’t seen many hiring Java devs either.
@keithamus I think your web development related advice is spot on. Learning transferable knowledge is always preferred to learning tools.
However, knowing one or more languages in depth is also very useful. And here we need to be honest, boring languages like Java and C++ reign supreme and are vastly more widely used than the hip and new languages you mentioned. I also don't think complicated setup is an bad for learning, it's what you have to deal with in most real projects as well.