Way to be disrespectful to someone you don't know over the internet. I guess you win because I'm not going to be like that to you.

Go ahead and do an on-the-car rethread, chances are it'll probably be a successful repair. Hell, the spark plug is probably a foot down in there. I'll admit I do them in my shop with the explicit understanding that I do not guarantee any repair durability or subsequent damage from the metal shavings or repair insert failure. Deciding to do an on-the-car spark plug thread repair needs to be an informed decision. You must understand that there's a chance you'll turn a cylinder head repair into a complete overhaul or perhaps you'll be taking the cylinder head off anyhow if something goes wrong. I've seen a few gouged cylinder walls in my day from on-the-car spark plug thread repairs, despite techs employing the usual cleaning measures. Don't forget the repair coil can blow out too and if that happens you're buying a replacement cylinder head.

The most durable repair is done by removing the cylinder head and taking it to a machine shop to be repaired. Unfortunately, this is also the most expensive/time consuming method too.