“ TL;DR almost everything you learn during an interview is noise. So keep it short, focus on technical ability, and unless there is a red flag make your real decision together in 3 months.”
How often is a person looking for a job still available 3 months after interviewing? Assuming that the person has been looking for a job and interviewing with other before you, you are assuming that this person has not been hired after 6–12 months of looking.
If they are good, then why would they still be available?