I personally don't.
If the pistol build details were discussed and the purchaser sought out those details because that is what the builder is know for then how is that bad? If the builder has 100 hours into cosmetics, small parts fit and finish, hand checkering and so on. Why should that gun sell for less then someone else's build that has 100 hours into it but more time was spent on barrel fit then cosmetics or beavertail fit?( I'm using the 100 hours as an approximation. I have no idea the actual billed hours.)
Now if the builder gave an accuracy guaranty and the pistol did not deliver that because the barrel was not fit correctly or the pistol did not function because of the "poor" barrel fit thats a different issue.
If you asked 5 smiths their opinion on barrel hood to breach face dimensions or upper lug engagement you will probably get 5 different answers. So who is right?
My personal thoughts are that if someone puts 100 hours into cosmetics and doesn't know how to fit a barrel then you should probably save the money of them "building" the gun and send them a Ruger, RIA, Colt or Springer to just do cosmetics on. But $7k for a gun with no fitting and just some fancy cosmetic work? That would be like buying a corvette with a 4 banger under the hood. But it's not even about that. It's more about knowing what you are getting. Hey, if you are happy paying top dollar for a "custom" that isn't fit properly by the standards myself and many more before me used, it's your money.
What I can tell you is this. I've seen guns by Shockey, Giles, Chow, Curtis, Clark Sr., Sams, Marvel, Keefer, Dinan, Day, Maples and a whole host of other old time 1911 smiths. They all have one thing in common...good to great barrel fit on the lower legs to slide stop. And many times they had to work with the factory barrels, welding them up, cutting them back down to fit, etc. So if you think I'm wrong, why would guys for the past 60+ years strive for that perfection? Yet today it's seen as, meh, not that important...
I don't really care what folks think were my reasons. I've explained that it's about education. Those who want the education listen. Those who don't, talk behind my back. My door, phone, email, pm is always open to those with a willingness to learn. Those who have contacted me know that. I'm just not into good nuff. And I've seen enough work come through my shop and when I worked at Marvel to know the difference.