If you don't use language servers, you don't engage with development environments which rely on them, you need not learn them.
If you're making chips on a Monarch 60 you don't need to learn shit about CNC. If you're pushing buttons on a Haas you do.
If you're coming from a Monarch and want to try pushing buttons on the Haas on the kids are using, you need to learn how CNC works. That's your job. If you want to switch from notepad to Zed, you need to learn how language servers work.
Can you not use Zed without knowing how language servers work?
Some languages are more severe than others on this. For example, in C++ your editor is not going to be able to make efficient use of the clangd language server without intervention from the programmer to understand and configure it. On the other hand, for Python the Pyright LS will be mostly fine without additional configuration.
I only had to silence a couple of unneeded warnings specific to codebase I was working with, which took under five minutes and that only because I finally got annoyed enough. Otherwise it took zero configuration (this was Kate though, but it doesn't matter, there is no clangd-specific default config there).