"Juniors" (or anyone besides maintainers) do not fundamentally have a right to contribute to an open source project. Before this system they could submit a PR, but that doesn't mean anyone would look at it. Once you've internalized that reality, the rest flows from there.

> Ah, we have converted a technical problem into a social problem.

Surely you mean this the other way around?

Mitchell is trying to address a social problem with a technical solution.