There are a lot of things you don't need to know in order to use a language fairly effectively: you can always look up syntax & things like operator precedence.

There are a lot of things you don't need to know in order to use a language fairly effectively: you can always look up syntax & things like operator precedence. While that is a good strategy when you need to switch languages frequently, it also means you'll never be an expert in language X. Which, for plenty of programmers, is a good thing.