Seems like a good time to dig up this picture I have from like 8 years ago...
Even before this dummy ignored the "squealer" indicator on the pads, went metal to metal and just anilhilated this setup, these rotors were not going to be reused.
Many high performance brake systems, like the Brembo setup here, have very aggressive pad material. This wears down the rotor and makes them so thin, they are already below the minimum or "discard" thickness by the time the pads have worn out. Many many German vehicles are like this.
So it is very believable that whatever hot rod car Berto's GF has (pics or it didn't happen bro), is probably in this boat. Les Schwab, Firestone, Midas, the dealership, and probably even the corner gas station will not try to reuse the rotors. Just about every professional mechanic takes those minimum thickness specs pretty seriously. Thin rotors can overheat faster and cause brake fade, which in turn can cause an accident. So of course any big company with a lot to lose in court is going to have a standing policy to not let a brake job go out the door if the rotors are under spec.
As for replacing calipers? What. The. Fuck? I'd find it hard to believe that Berto has got the girl rolling in some ancient hoo ride. So I don't think it'd be screwed up enough to need calipers. Now I have seen situations on some vehicles that have maybe had a brake job once or twice already, where I see some uneven pad wear from a sticking caliper. Ok, in that situation, I'm going to sell a pair (yes both sides) of calipers. No rebuild either. The days of rebuilding calipers are pretty much over mostly for liability reasons. Sure on some old cast iron one pot units, it's a fairly simple ordeal and will probably rebuild just fine. But on some of the newer monoblock aluminum ones, if you can even find a rebuild kit, you might find so much pitting in the bores, that they're scrap anyways. Maybe the gas station guy will rebuild. But again, no company with a lot to lose is gonna chance it.
As I said though, I doubt Berto has anything that is that old and worn out that it's got sticking calipers. So if that's Schwab's policy to throw calipers at every brake job, then they're just going way the hell overboard with the liability paranoia.