In theory, this is true. However, IME as a techie in the UK, those situations happen when there is a significant mismatch between the interview vs reality - from either side. Hiring based on referrals is one way to mitigate some of the unknowns.

After 5 months of being embedded in a team, firing someone who management doesn't like but who is popular with other employees will cause major morale issues even if they are still technically in probation.