Design conventions, whether in digital UI design or industrial design—for example a car or bicycle—are rooted in human behavior, mechanics, physics all kinds of other sciences and extensive research. They follow best practices and human expectations of how things should work because people are used to them, because they follow conventions. Those conventions have been worked out by trial and error over a long time, a bit like evolution and which have been proven to be very effective vs. some other idea. Judging from your posts here, you seem to be hell bent on calling everything “lowest common denominator” and disparaging everything and anything in sight which you perceive suggest the use of that. Rather immature. You are banging on this one line, you’re short sighted and see yourself as some kind of “innovator”, someone different, a champion of doing things differently because you seem to attack everything that uses “conventions” which you confuse with the concept of “lowest common denominator”. Maybe you should read some books on design.
Yes, it is my opinion that we shouldn’t ignore certain conventions because they serve as a foundation (from which we can innovate, yes) because it’s what people expect. It’s what works best, has proven to work best over long periods of time. Otherwise, you risk annoying the hell out of people. Imagine if every bicycle worked differently, every door handle or every car (the pedals and the steering wheel) in the name of “innovation”. That’s not innovation, that’s just trying to be different for the sake of that and nothing else.