Think about it this way: by making their lives easier, you make life easier for yourself, too. It doesn't take a lot of effort to put a proper .gitattributes file in your repo, but in return, you'll nip any potential future issues from Windows users who are trying to contribute accidentally or unknowingly checking in files with the wrong line endings.

Inb4 "I don't care about contributions from Windows users anyways": a lot of apps are multiplatform these days (usually Electron). It's unreasonable to expect people to do all their coding in Linux and only use Windows for testing, especially when all the tooling already exists on Windows. VS Code will handle a repo with LF line endings just fine as long as you told git not to convert the line endings when checking out.