I guess it is bad if you are the manager who is responsible for both mistakes. Otherwise, it is a reminder that it is a failure to hire someone that doesn't wo

I guess it is bad if you are the manager who is responsible for both mistakes. Otherwise, it is a reminder that it is a failure to hire someone that doesn't work out, and a failure to not be able to use someone as most people have some skills and firing someone is a very harsh thing to do both to the ex-employee in their ex co-workers.