What is the benefit of this to isolated teams? Rebasing a shared main that is under a constant stream of PRs is tedious and time consuming. What is the justific

What is the benefit of this to isolated teams? Rebasing a shared main that is under a constant stream of PRs is tedious and time consuming. What is the justification of this in terms of time spent for a company paying for that time? How is that time recouped via the availability of a linear history?