Paint is high gloss. They just had a good lawyer.
Gloss? how about polished stainless rear doors on a semi? how is THAT legal?
Back to the OP, the example pic has the usual failure to think about the design...the whole wrap could have been moved up 3", and then you could read the copy, rather than obscured with the reflective tape.
Agree 100% that the value is in the prep.
The failures you see at seams & rivets & corrugations is dirt or oxidation, plain and simple. Show the client the 3M prep specs required to get the warranty, all 7 pages of it!
Obviously the guys doing it for less than $4000 aren't cleaning much, & using the cheapest vinyl, generic ink, and kids to install it. ( dental plan?.....nope)
I'm so old that I used to PAINT semis for Allied Van Lines...still, found an old issue of Signs of the Times magazine, where they did cost studies across the country. The low bid for painting a moving co. semi, was a guy who did dozens, for $300. The high bid was $7000, ..........in 1985!!!
( sigh!) some things never change.
Figure out your overhead, wages, and materials, then decide how much the job is WORTH in your market, and how many you can, or want, to do at a competitive price.