Great advice if you want to be old and poor. Yes, there's a chance it works out because you're that good, but there's a chance it doesn't. This doesn't mean do the opposite and only worry about your returns, but strike a balance. The world we live in is not in general a bunch of isolated people in a meritocracy, connections and relationships within your workplace play a huge role. Politics exist. I know a lot of asshats that are highly successful even though pretty useless. Don't be that person, but don't be there for everyone and empty handed in the end.

Better advice would be stay hungry, stay curious, keep learning.