Just an assumption on my part, but I'm getting that you might think there are some differences mechanically or parts-wise in guns that are built to be beautiful traditional polished blue guns or guns that are built to be "tactical guns". Are you of the opinion that there are differing levels of quality in the parts used in guns at this level? Or have you been led to believe that a "tactical" gunsmith knows some secret processes and techniques that have eluded those who build "display pieces"? If so, the koolaid is indeed potent on your end of the internet, and you would be mistaken. At the level the LTW smiths build at, you are pretty much assured of the best quality parts installed and fit correctly for long life and reliable service. Cosmetics and finish are just that - icing on the cake, in differing styles for differing tastes. I haven't heard of your guy, but you trust him and that's OK.
As far as values go, your intent seems to be to "prove" either the gun or yourself by subjecting it to a prolonged torture test. You're going to trash any residual value you'd have anyway. It's a moot point. I think you'd find the percentage of guns built by these guys that live in safes to be small. Don't let the looks fool you - they're made to be used and they are. I don't know anyone who doesn't shoot his (fill in the blank) custom because he's trying to preserve it's value. That's just not why they're purchased.
Do smiths get offended when you scuff up your gun by abusing it? Not once it's been paid for.
They'll gladly build you another one, or refinish and repair the one you have. Price is typically commensurate with the level of work needed to restore.