> they implemented a feature or fixed a bug for the community!

yeah but, did they really?

All IMHO of course, but:

If they understand what they did, it follows that they understand someone has to approve/disapprove that contribution for it to land in the repo, and therefore, size their contributions accordingly to make reviewers lives easier.

If they do not understand what they did, they should not be attempting to land high-value high-complexity contributions yet; they should start with something smaller precisely so they can learn.

Edit: I realize I probably sound too grumpy about it, its just that they could be doing it in their own project, in their own repo, where they're free to go for anything they are comfortable with.