You work 2000 hours in a year. You ideally have an employer you like and stay with for many years. That's not worth 9 hours of your time?
That's a loaded question. How about just saying it for what it is. Are you willing to spend 9 hours today (not counting the other interviews you have to do for other companies) for a X% probability of getting a job at company A which you like Y amount.
If X and Y are large enough sure. Most of the time X is hidden and Y is hard to gauge.
That’s not how it works for the applicant. Many people are applying to nearly 100 roles a month.
Suppose you get interviews on 10% of those. That’s 10 interview pipelines, and if every company had this policy, 90 unpaid interviewing hours.
Like the comment elsewhere in this thread, candidates will find other roles before your interview gauntlet concludes.