It's not a false dichotomy. They're just using different terms than you would, based on their experience with how the people around them use those systems.
>I loathe GitHub PRs because of this. Working at $dayjob the unit of change is the commit, and every commit is reviewed and signed off by at least 1 peer.
Because this is exactly what a squash merged PR is. There is no meaningful difference unless you say "but commits are done by good people and PRs are done by bad people".
They made it pretty clear they're talking about not-large commits. And they're contrasting that with any-size PRs.