Lol. What do you get out of this fanatical PT worship.
Nero show guys obv aren't engineers, but they are high level racers who have built a lot of bikes and follow the industry pretty closely. And as an engineer, I'm tired of how guys like PT and Hambini leverage the profession for worship and antagonism. If you have to preface all your insight and opinions with "im an engineer" it just reeks of insecurity and authority fallacies. PT spends about as much time pumping himself up/putting others down as he does providing actual info.
The good news is these guys actually explain their rationale for their criticism. The BB issue has been explained ad-nauseam by PT, Hamboner, and even the BBright dude. It's not hard to understand: if the hole is too small or egg shaped, the bearing is not going to roll right and will eventually destroy itself. Hambini in particular has pretty much put up tutorials that explain how to figure out the tolerances you need. PT is right, most punters who buy Chinese frames aren't going to be able to properly correct a bad BB.
I'll admit both PT and Hambini are kind of insufferable "well ackchuhlly" types who often overanalyze to the point of venturing into "wanketeering" themselves. My favorite instances are Hambini claiming that the Ribble water-bottle-shielding downtube was dumb because "you can just run aero bottles", and similarly PT's "analysis" of Paris Roubaix bikes, claiming that everyone should be on full-aero full-suspension Cannondale Topstones, when the Dogma FS and K8 already exist--and have proven the gain is just marginal if nonexistent.
On the other hand, PT and Hambini have ample examples of "I told you so" moments: PT's criticism of open spoke holes (not exactly a cutting-edge call since this was already an issue 15 years ago), PT's catch with the CRW front hubs, Hambini's criticism of Shimano cranksets, etc.
Really, the way to receive these guys is to forget they're engineers, listen to their analysis, understand it, and decide for yourself if you agree.