Okay, you state that it sucks to be the guy who falls to the back of the pack for running street tires. Money is an issue and you want to save a bit of cash.
But within a few months of the inception of your rule or experiment, it is likely you'll again fall back to the rear of the pack. Another racer is going to show up with street tires and want to go faster than you. Racers want to go as fast as possible within the rule set permitted, even if that is an ad hoc or localized rule set.
I am not "at the back of the pack". far from the front, yes, but by no means the last car, EVEN as the only guy on streets (SARRC races excluded. as one of 2 or 3 B cars I usually am the last one there, even on Rs). and I have a path to improve myself and my car to close that gap some. the STC is part of that, as it actually saves me money. other people like the idea, too. some of them are old guys who show up with the same car they've been running for ages and just want to race, others might be newer to the sport, less financially able, or simply see this as an attractive thing to try. they may talk about "real IT lap times" or just honestly get that this is the level of development they can support for themselves, or be working on developing a car and driver and cut tire costs to aid in that pursuit. whatever the case, they are, at least for the time being, mid pack too. and this would save THEM money.
how much money varies, certainly. but some of the vagueness of reality doesn't fit on your spreadsheet. lock them up? spin? rains? STC is more forgiving of driver error in that it doesn't kill the tire, and actually seems to be a good learning tool by forcing clean running to get max speed but also being forgiving of oversteps. it's also a bit easier to catch when you do slip up, and many of them are fair rains. less replacement, longer lasting in the first place, and one less mounted set of tires. more savings.
anyone who starts last and ends last shouldn't be surprised to be last. if your expectation is not to be midpack to last, you wouldn't be part of this experiment.
I completely get the evolutionary arguments, but even if this took off, became a national or defacto rule (which again, I am NOT advocating)lower cost longer lasting tires for all means cost savings for many. there will be those who shave and optimize cycles and end up spending more than they do now. fine - you can't stop a racer from being a racer, but you can recognize that a lot of guys out there aren't on header design 3 in season 2. more like "same thing I bolted on in '95". they don't think like you and are already going slower on lesser equipment. this changes nothing in that regard.
and I do not begrudge the evolution of IT into "prod lite" I don't necessarily LIKE it but rules cant stop that from happening, only culture can, and a culture of competition will not. great. I am amazed by the ITS fields in the SEDiv, I am blown away by efforts like Ulbrik and Keane and underwood in ITB, doubly so by team Earpstang and the TR8. it's awesome. but it is NOT the entry level racing series it once was and along with SM, the economy, and life's ebbs and flows, I think the evolution of IT is one reason the car counts are down in IT in so many places. what can be done about that? very little from a rules standpoint. the rules are good now, and we're all proud of the stability of them and the fact that you CAN legally and affordably race in IT, just no where near the front in any well subscribed field. but from my perspective, anything we can do to foster a SUBGROUP of that old "bolt on" culture is good for the club as it could mean more cars, lower costs, and happier racers.
meanwhile, I'll be inching my way up to insane development status as I can afford to do so, so that I can join you front running types in standing on my achievements as measured in wins and records, rather than the successes I'm currently shooting for of helping people have fun and enjoy our club and our wonderful, stable, and balanced IT rules.