If it's taking months, then they're doing it badly. Our hiring process is five rounds but it never takes more than a couple weeks, including the negotiation phase. Our data shows that we need something like 14 resumes to get one candidate worth interviewing. Of those, it takes 4-6 candidates for one hire. Hiring and firing fast means we also have to invest in onboarding, training and allowing people to settle in. During that time, we've filled the current position and we're no longer interviewing candidates. Once someone is fired, we have to go through the whole mess again. That would be the most wasteful model for everyone involved. By my math, that's a minimum of two months of time on a single person (I think six weeks to fully productive is reasonable) just to go back to searching again. And that's just the US and ignores the two week notice (or more) for each candidate.

I hire in APAC too. Indian engineers are giving 60-90 day notices now and that's contractual. Two candidates, using your model, could easily take up a year. (Hiring in APAC take a long time already.)

I can only assume you've had some bad experiences lately but your personal bias has created a really bad mental model for you that would be a net negative for everyone.