The alternative is a merge that potentially has more bugs. Trunk based is definitely not twice as long, rather 1.5x on average

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.