[yichi]

Linus torvalds famously said you shouldn't rebase for shared work, it's not a clear cut thing that not knowing how to rebase is bad per se since you shouldn't be using it a lot in the first place in his philosophy, refusing to learn is a different story however.

[Tade0]

Specifically he said that changing shared history is bad - that would be the master/main branch or release branches, not e.g. your branch.

Not knowing how to rebase means that in order to stay up-to-date with a shared branch you would have to merge it each time and thus produce something akin to a spruce tree in your commit history.