Heater cores

[77ITA]

I really don't follow the simplicity argument. The simpliest thing is just to leave it stock

When building a car from a bare chassis up, that doesn't really apply... but I digress; laziness is not what I am talking about here.

Some cars, are not as simple as two radiator hoses and two heater hoses. For example, here is a diagram of the coolant hose routing on the S2000. There is quite a bit of excess junk there that is associated directly with the heater core. It would obviously be more simple to not have that, but again.. my goal here isn't a rule change, rather to understand why the rule directs me that I need to keep all that junk.