LSP optimizes writing the code. Yet debugging, reviewing and reading other people code take significantly more time than writing. If code is organized badly and go-to-definition or even moving the mouse to trigger the tooltip is required when doing those tasks, it makes the whole experiences worse.
I would actually phrase that as “LSP optimizes for understanding” (which is of course important for writing code).
For example, when doing code reviews I routinely pull the branch down and look at the diff in context of the rest of the code: “this function changed, who calls it?”, “what other tests are in this file?”, etc. An IDE/LSP is a powerful tool for understanding what is happening in a codebase regardless of author.
