I used to buy used gpu's, that were heavily used for F@H. Got a fair amount of use of them, before they died. A mining GPU was most likely better taken care of, than those cards, I bought in the past.
I get what you're saying. One analogy I've heard miners use is "Would you prefer to buy a newer car with a lot of highway miles, or a lot of city driving miles". It is a lot of miles nonetheless, on a newer product, 24/7. The prices for new GPUs are coming down to the point that, for example, if you were saving those $500 for a 3060ti two years ago, now you can get a new, warranty compliant, higher model like a 3070ti that could last a lot longer than a used 3080 that if something were to happen to it, it could probably not be covered under warranty.
I'm probably biased, but after months, and months, and a few more after that of fighting bots, and reading TH write about "Best cards to use for mining", the idea of helping them make another profit is absolutely beyond me.