I also don't like the idea of forced default setups. I never use default setups. Some might say it levels the playing field due to everyone running the same setup, but what if the default doesn't suit my driving style, but suits someone else's?
Me and a friend had this conversation about Race of Champions. I said it's interesting seeing how drivers from different disciplines go against each other in identical cars. He said that the set ups are fixed for each car, so the drivers can't adjust them to their liking, which in theory could work for one driver and against another driver, making any comparisons in RoC pointless. As an example he pointed out one successful rally driver who went poorly in the rally car, due to it being set up way too stiff for his style. It's a bloody good point. Having one make races will level the playing field. Forcing everyone to run one set up will not, because one set up will always suit some people better than others. Being able to set the car up yourself will show not only your driving skills, but also your set up skill.
So I'm with you mate, it aint my cup of tea either.
I think that's the right call in your circumstances, enjoy!