There’s some truth to that. But there are also a LOT of “self-taught” cranks out there who think they’ve discovered an amazing new theoretical framework… but if they’d done any background reading, they’d know it’s been tried and didn’t work.
YouTube. I think in most cars it’s gonna be a discrete component that can just be unplugged. The big question is what functionality you lose, and whether you can live with that tradeoff.