Not worth it unless you have your own lathe or get your chambers cut at a huge discount or free.
I wouldn't waste the cash, but I also have to pay full price for my gunsmithing.
I'm not sure that I would agree with you on this KT...
A new over the counter Bartlien barrel at Hirsch Precision is like $600 and a barrel fitting job is... or should be $300 at any "fair" pipe fitter. Fair, meaning not the rip off opportunists who so often gouge the unwitting consumer.
Ok, so even if you were to pay $450 for the pipe fitting job... its still less than the cost of a barrel alone.
So if the re-fit barrel lasts half as long as a new barrel, then it's still a better value... and it will last at least that long.
Barrels don't wear out all the way down the barrel... they wear out from back to front, so setting the barrel back is a fair option, especially if its for a practice barrel or a competition barrel for someone who is not a top line competitor...
The only real performance problem is that you will lose a certain amount of velocity because its shorter.
I've shot F Class with guys who did this all the time... and still managed to win a thing or two.
It also opens up a certain amount of flexibility for the shooter... Suppose we blend both strategies...
You send your rifle off for a new barrel and while it's there, have the guy re-chamber the used one.
If you purchase an action wrench and barrel vice, you can swap the barrels out yourself to suit your practice, vs competition vs hunting needs. I know at least a dozen guys who do this all the time, counting me that's > 13.