I'd argue that the choice of language is much more analogous to your paintbrush and other tools than to the color of paint Obviously someone skilled in a craft can still get work done with different tools, but being able to choose and rely on the tools you're most effective with is one of the perks of being a craftsperson

don't forget that using a programming language isn't only the syntax. consider the ecosystem and community that you'll want to deal with on a regular basis

It's more about specializing in something. It's good to know about different types of architecture. But it's not a bad thing if you want to build houses and focus on that instead of also building bridges, shopping centers etc.