Sometimes it’s tough to pull the trigger. This candidate fits, well enough, but we’re not excited about them. Maybe we can find better.
That’s fine, and a good reason not to pull the trigger. Just make sure that you are aware of the risk. If you look for someone better, a candidate that wows you, you may lose this one. Every situation is different, but if the risk of losing this candidate is something you can deal with then you probably don’t want them at all.