Right, because ~1200(IIRC) bucks labor for a Porsche Ceramic Disc Break job is totally flat rating it. No, instead, they are overcharging you for any possible circumstance... which makes this analogy useless in this context. It only gets worse for other manufacturer-spec racing vehicles.
Talking about manufacturers: It doesn't matter if you're building a Ford or a Ferrari, you're still subject to assembly-line economics. Theres productivity optimization in that mix - something you can't discount.
Jeez, these assumptions are killing you.
Hopefully without outting myself: 2006-2008 Licensed SCCA driver who performed in Prepared and Modified class competitions with a Subaru and a coupe, which for obvious reasons I won't mention.
Yeah, I think that makes the mentioned mechanic qualified... but seriously, you're just looking for any possible way to discredit me when you missed the point altogether: mechanics jack off while working on your car. All the time.
Heart of the matter: They aren't charging you to deal with every possible circumstance. They are charging you to make the economics of a service/body shop work. It is quite routine for a good mechanic/tech to flag 80 to 100 hours in a week while only working 40. You seem to be implying that a mechanic will charge you 10 hours b/c that is how long it took him to do the work, including breaks for jacking off. I'm telling you the system doesn't work that way. He charges you 10 hours for the work b/c the shop probably quoted you that to start, most likely off the basis of some kind of predetermined, published labor time. In reality it will take him 4 to 5 hours to do the work, including breaks for jacking off. Do you get quotes for the work that your mechanic does for you or do you just show up and pay the bill at the end?
SCCA is still light years away from the kind of stuff that is happening on top racing circuits in regards to customization of vehicles. The "Ford Fusion" spinning around a NASCAR track has little resemblance to the Ford Fusion parked out on the street. The same cannot be said for the SCCA at the prepared class. Correct me if I'm wrong, but the prepared class in the SCCA doesn't allow much structural modification and some (majority of?) allowed mechanical alterations are still subject to manufacturer allowed tolerances. If you are still dealing within manufacturer accepted tolerance ranges, pre-published labor times should be the basis the work done. If you really have found a mechanic that is charging you on the basis of hours worked rather than hours quoted keep him. I do wonder exactly how you would know that he is billing you for the time worked on the vehicle if you aren't by the vehicle's side during the work?
I'll plead ignorance on the modified class.
Why did you stop?
For the prepared class: You can do quite a bit of modifications to the body and the drivetrain. Includes everything from enlargement of wheel fenders to a full-on roll cage. You can add a different fuel cell. It's just a huge list of restrictions. You really have to get creative to eek out time from time attacks and autocross.
As for the Modified class: It's pretty much limited by weights and engine type/size. You can have upto a 6.0 NA, smaller FI I believe... and the engine has to be the same brand as the car, though luxury brands count as well (i.e. A Lexus engine in a Toyota). Again, without going into detail - it's not as customized as.. NASCAR(I don't have 3 mil to blow on a car), but custom fabrication is allowed and encouraged. For instance, I drove an originally AWD car with a RWD drivetrain at one point.
I stopped because.. well, it's a full-time job with inverse pay(You pay to work). It was fun though.
Point is, these guys were involved in quite a bit of custom fab, sourcing parts, etc. Their labor was not predetermined, at all.. even at the prosumer/amateur level. I see what you're ultimately saying and it makes sense. What I'm saying is: Yes, you are paying while a mechanic jacks off while working on your car... so why not a lawyer?