It stops at the tools you use, "it's a tool you use every single day". If it's not a tool you use every day, you don't need to learn it.

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.