Yea I get it but once you stray away from the design parameters. Stuff happens!
You claim the extra heat is actually better, but if the entire system is not designed around the extra heat ultimately it's not better. It's a CEL and a headache.
A headache that those who like to tinker can handle, but its a headache for those who prefer to just drive without any unnecessary tinkering cannot.
I will never convince you that tuning is bad. In fact I don't believe it is entirely bad myself.
However I do believe that while tuning can certainly enhances performance and makes a vehicle more fun to drive. It also leads to unintended consequences that have to be compensated for via additional maintenance and repairs.