lsp-restart does not take into account what language servers are installed, is this a good idea?

[David-Else]

Currently the lsp-restart (space for auto-complete) command simply lists the language servers from the config.toml regardless if they are installed or not:

In the above example I don't have either installed, but they are listed. If I select one I get an error:

I can imagine an argument to say that someone might want to install the language server while a file is open then try to load it, but is this a common enough use case to justify listing uninstalled language servers?