Well that "right there" tells me all I need to know. If "you don't think" the Whiplash and Thumpr cams work, you're peein in a fan. Cause buddy, lemmie tell you, they DO. I agree "there are probably" better selections, but for what they are they do work well. I don't know of anyone who has one that's not happy with both how it sounds and how it runs.
All that said, that type grinding is nothing new under the sun. Crower was doing it 50 plus years ago with their Hydraulic Hauler series. BIG duration split, LONG exhaust duration and a tight LSA.
You just gained all the credibility in the world of a keyboard commando with your comments. "Fool things"? Hardly. Optimal? Maybe not.........but they DO WORK.