Naw, I think that's a bit harsh, Toby. It sounds like he has guns in which this is not an issue, and understands the need for heavier recoils springs so they cycle properly.
But, yeah - liability. Maybe not a big deal when this was a hand loading only gig, but at least one company offers it commercially. Then again, Buffalo Bore has long offered both .45-70 and .45 Colt loads well in excess of SAAMI pressure limits, for use in modern firearms. Their stuff would destroy any original Trapdoor or Colt revolver. Yet they have sold it for years, and yes, it does fit these older guns.
I fire a lot of both of those rounds both in notably weak vintage guns and in very strong modern guns. What I have done, for my own safety, is load the high pressure stuff in such a manner so that it will not even chamber in the old guns. The cases are identical, but I use bullet selection to preclude mixing them up.
Here is an illustration of what I do. Two revolvers chambered in .45 Colt, one a modern Interarms Virginian Dragoon cable of accepting 30,000 psi loads. The other is an original Colt, limited to about half of that. The size difference is readily apparent in the following photos:
In the photo below, you can see that the round on the left is notably longer than the one on the right. It is loaded with a 300 grain bullet pushed to over 1,200 fps. The round on the right is the classic, original load featuring a 250 grain bullet at about 900 fps. The one on the left will stick out of the front of the Colt cylinder, so the cylinder wouldn't even turn. Oh, and notice the difference in wall thickness around the chambers. Coupled with a different alloy and heat treat, that Dragoon cylinder is a good deal stronger than the Colt.
Buffalo Bore doesn't do this, which I think is absolutely irresponsible. The old .454 Casull is essentially a ".45 Colt Magnum", and it does indeed use a longer case. Thank God - that thing runs at up to 60,000 psi, more than most bolt action rifles. So, more than one way to skin a cat, and it seems to me they should have used one or the other.