We have perfectly repairable vehicles (of all kinds) towed out of here all the time. Just yesterday a ~2012 GMC Acadia with a chucked chain (common issue). The rest of the vehicle was reasonably decent shape, maybe a little dirty and it certainly needed tires and probably a handful of other normal wear items.
We are just a wasteful society. And not very bright. And banks exploit this. Why spend $2500 to fix a car you already own outright, when some bank will happily loan you $25k to buy another slightly used car you cannot afford to maintain. Because sadly, many people cannot afford a $2500 repair bill, but can afford (barely) a $500/mo car payment. Which makes no sense to me, different kind of math I suppose.
This is changing, though, as several factors as of late have shaken things around a bit. Scarcity of new cars, the ever-bloating price of them, which translates to the not very old used cars either being kept longer as well as holding their value better than they normally would, which means the even older used cars also get kept longer as well as holding their value better, and then finally people faced with a big repair that CAN afford it just deciding to go ahead and do it because it will be less expensive than trying to get something else.
We are also seeing some really, REAAAALLLY, crappy newly purchased used cars coming in here that need a bunch of stuff that we've not normally seen before. These are often graced with the now commonplace expired temp tags, because these cars were bought as-is and would not pass inspection for registration.
I've got a real turd of a CC here that needs its DSG replaced, because the guy bought the car from some can lot, it had just had a bunch of engine work done (CCTA, the skidmark on the VAG engine family underpants, a member of the EA888 Failitron DoublePlus Supreme batch, so no surprise there). This included what looks to have been a rear main seal, because the transmission was clearly (and poorly) R&R'd. They didn't properly tighten down the CV bolts, and the left axle came loose and ground through the transmission case. But this guy is balls-deep in this thing. He paid too much, and has no recourse because it was sold as-is, and if he'd have immediately brought it to a reputable shop *maybe* this particular catastrophe could have been avoided.