If you are used to PRs taking days (or over a week!) to merge, then I've found it's way faster to get someone to sit down and walk them through the code - which is not miles different from what's being proposed here.
It might be worth it if it reduces bugs. If you’re running a payments company maybe working software is more
important than saving a buck and shipping a day earlier.
Braintree was a pair programming company for example.
If you are used to PRs taking days (or over a week!) to merge, then I've found it's way faster to get someone to sit down and walk them through the code - which is not miles different from what's being proposed here.