I think the idea here is that reviewing individual commits is irrelevant if the plan is just to squash it all down. Each PR corresponds to a single change on the main branch in the end, the fact there was a main commit followed by a half size “fixed typos” and “fixed bug” commits doesn’t actually matter since it will be blown away in the end. The process results in the same clean history with good individual commits on the main branch, just as if the user squashes those commits locally before pushing it up to the code review platform.