Big-Block, I think you are 70% correct

I agree it is just added complexity, weight, and serves no real purpose in 70% of RC's.
I have found that my HV (8S) low KV cars run VERY cool, and do not need ANY cooling.
But, I can't race any of my HV stuff in a ROAR race or out in the rain.
2S lipo doing 1400watts need cooling, and until Castle starts waterproofing their controllers I need some kind of cooling system.
On the subject, I have decided not to persue buying pumps from abroad.
Instead I have purchased a CNC 4-axis mill and am going to try building my own...
Should have the machine in a few weeks, then we'll see what I can come up with.