I think vim-sensible is much less of an issue than oh-my-zsh.

Sensible isn't a whole mess of scripts and settings. It's 100 lines of highly readable vim settings and at the top there's a comment instructing people to use :help to learn more about what everything does.

I guess a case could be made for adding descriptive comments to make it more approachable for beginners, but it's not some black box of magic.