I'm going to just simply say you are wrong.

Take your fish and go have dinner.

Fact is that many people won't push themselves. Getting someone to up their cadence will get them to do just that. As they work to get more comfortable with the higher cadence, they are getting stronger. You are so hell bent on saying that cadence is the result of work that you can't see that cadence can get people to do the work. Seriously, you are so determined to win the chicken or egg argument that you can't understand that people just want something to eat. And it ain't fish.