Sure it is. People on our team need to take time to onboard the new hire. That's good and expected. The new hire will work slower and that's ok; they will need extra help, time to learn the codebases, etc. After a couple of months, a particular new hire did not work out. Time had to be taken to document reasons, meet with HR, meeting to talk about expectations, etc. In the end, the new hire is gone and so is the time the team spent helping, and the slowdowns on real deliverables, and the hit to team morale. It sucks when someone is let go. It was a net negative for our team and thus the whole org. Depending on a combination of level (leadership position?) and toxicity, negative impact on the team or company culture can occur. Bad hires can have a real cost.

I believe that to be an incorrect statement, based on my own experience. I have seen companies hire the wrong people and pay the price.

Every company has a “probation period” usually 3 months where either party can terminate the agreement.

I believe that to be an incorrect statement; while I've always seen probationary periods, in this very set of threads "akelly" says that nobody has probation periods. This evidence suggests that "akelly" has never worked at a company with a probationary period (and has foolishly extended their own personal experience into the universal, but that's a separate mistake).

I would also suggest that there is an opportunity cost attached; if someone is fired at the end of their three or six month probation period, the good candidate that replaces them is six months behind.

Some companies end up with drifting dead wood employees; not fired, just moved around from team to team, department to department, because the company makes firing people harder (or more costly to the manager / team-lead) than moving them. This can go on for years. That seems quite a large cost. I've also seen managers simply sideline bad employees rather than dismissing them, for reasons of company politics and face. I've also seen bad hires get promoted, in cases where promoting someone is easier and less costly (to the relevant team lead or manager) than dismissing them; that can be really damaging.

Yeaaaah no. I've seen people nope out of a job within anywhere between 30 mins to a couple of months. I've also seen people that knew it wasn't right for them stay 1 to 2 years.