Re-holstering - just how important is it?

Let's assume that the bad guy's down, but not fully cooperating. You've called 9-1-1, they're still on the line and you've described what you look like. When you see the door on their car open, that may be a good time to re-holster.

On the other hand, if you aren't going to try to cuff the guy, how important is holstering easily? If I miss on re-holstering, I can just shove the gun in my waistband until the police take control. Once they have their guns out, I'll follow the officers' instructions.

I think the popular shooting sports have over-emphasized this aspect of gun handling.