They are effectively the same, assignees is deprecated
The referenced doc doesn't mention "kube-proxy" anywhere and I don't think this is a general best-practice in many environments. And even if it is the opinion doesn't help users.
* API Aggregator * Additional bullet points * incorporated feedback for apiserver-aggregation.md * split setup-api-aggregator.md into two docs and address feedback * fix link * addressed docs feedback * incorporate feedback * integrate feedback