Because you’ve bought into all the drag racing hoopla. Running a street car sub 180° is entirely pointless.
People seem to think it makes more power, but that’s not true. Colder air coming into the engine makes more power, and on a street car the air intake temperature is not the same as coolant temperature. Coolant temp itself has very little to do with power.
Sure, in a drag car where you’re going to shut down after a minute and ice the intake. But on a street car with an engine compartment being heated by the exhaust manifolds or headers for miles on end? Nope.