I think of it this way. If AI could build the product alone, then why would it ever be worth more than the tokens you spent on it? I think this would hold true 99% of the time. It's literally like asking someone "Can you pay me $1m for new gadget? I hired this other dude for $20p/h and he made it in a week". It simply doesn't add up.

The 80/20 rule still stands.

The is the crux of why I don't get the vision that with AI everyone will be entrepreneurs. If everyone can start a successful business simply because of AI, why wouldn't their potential customers just do it themselves?

Airlines capture almost none of the value they enable. The business man taking a business class plane trip to land a business deal doesn't pay more or less for the flight based on how big the deal is. If the tokens enable software worth a million dollars or zero dollars, it's all just tokens to the seller.