Most of their nifty names for what they do are simple techniques you could do at home with some household materials, and unlike some others, I do feel with the right-now how you could approximate the gun on your own for cheaper, with the exception of any barrel mods Wilson may do (and for that price it better have a custom lengthened forcing cone AND porting).
I suppose the same could be said about Wilson's 1911s though a lot would depend on whether one wanted a firearm or a hobby.
There's certainly nothing wrong with parts swapping and amateur gunsmithing as a hobby but a lot of people would prefer to buy something with a good reputation that's already put together. I suspect this plays a role in why Wilson, Baer and Brown remain in business.
It may be a bitter pill for some and irrelevant to others but something from Wilson will invariably sell better and maintain its value better than a Donny Dremel Shadetree Special Ops rendition.
One's assessment of the worth of one's own time and skills is a personal matter and just because you'd prefer a DIY project is a poor reason to assert someone else got "hosed".
"hugely inflated price" is also a personal assessment and, if I'm not telling tales out of school as it were, is coming from someone that started off not even willing to
consider an HK for a suppressed firearm even though it would appeal to many as a path of little resistance. There's nothing wrong with the Glock for such an application and many may prefer it for good reasons but your assessment of the worth of your own personal time and / or willingness to pound square (or at least slightly out-of-round) pegs into round holes is not something that can be readily projected onto others randomly.
Wilson shotguns, Baer handguns and Wild West guide guns among a host of other products will always enjoy appeal among those that appreciate quality and don't harbor intentions of serving as one's own gunsmith.
I once liked to tinker with firearms but model trains are easier. On a totally OT note, I would personally pay anyone extra to NOT port a shotgun barrel.
I have a Cynergy sporting with ported barrels and it grinds on me just a little.