There's no such thing as a hiring process that avoids that problem 100% of the time.

After all, most people will be on their best behavior during an interview, and even a lengthy interview process is a very short period of time compared to working with someone for weeks or months.

Not 100%, but well enough that it shouldn’t be a general expectation to have someone like that on the team.

They’re all bad hiring processes. Some worse than others. Hiring known quantities can slip onto nepotism shockingly fast.