My answer is, why not? Just like an intercooler, or a VNT turbo, or water/methanol injection, or a 3" exhaust, or manual transmission..... I can do all of that and still get whooped in the 1/4 mile by a stock Toyota Camry V6. I do it because I can and want to. That's the passion I have for these things.....

Also, If it will help my engine run better in the long run and/or help the engine live for a few extra thousand miles, it's paid for itself and worth the effort.