CAFE is the corporate average fuel economy standard (hence the acronym) and EPA tailpipe regulations are why catalytic converters show up. You don't even recognize that they are separate things. Health is effected by air pollution. There are doomsday people but the air in LA or Chicago would look like Shanghai or Beijing if you were in charge. The smog was really bad in those places in the 70s and even I remember Chicago not being super good in the early 90s and it's actually significantly better now. So the fact that you hate this stuff doesn't really matter. It's not going back.
So which is it? They aren't rollers. You never said it has to be the same. I mean you love blanket statements and contradictions. It still needs the oil film not to scuff
Also, you run roller cams all the time in what? It's kind of like tuning modern EFI, not sure why we have any reason to believe you know that. Carbs, yes, I'm fine with that.
Carb icing is a real thing, especially when you don't have any of the anti-icing stuff like a heat riser, exhaust crossover, heated intake tube to the air cleaner. When your transfer slots are frozen the car runs like absolute total ****, its happened to me. They teach about carb icing when they are training for a pilot's license since it's even more likely to happen in that application. Its 50F or less and over 80% humidity here A LOT.
https://www.hemmings.com/stories/article/carburetor-icing
I have no doubts that you can help someone work through carb issues with enough time and enough screwing around and improved results. They just have big drawbacks for a lot of people, but you said it's all bullshit. Not offering a solution. There is a topic floating around somewhere here where I asked about fixing any of the issues with transition on this very forum way back when and only ONE person did anything to help with the IFRs and air bleeds that got the thing to work effectively to the point where it even worked when warm in the first place. The rest I figured out on my own. This is why I think the average guy will have a much easier time with EFI so they can enjoy their car instead of spending the next 3 weeks messing with it to get a halfway decent tune up on it for a warm/dry day.