You are not getting the point. When you push someone to choose a career and not let the choice organically evolve, because the family wants it, there are two very probable outcomes. Firstly, person ends up doing something which he/her may not enjoy which leads to unfulfillment. Secondly, doing something what you love, makes you do it better and make more money too. So you might be asking a future baseball star to be an engineer.
You don't push and force them to do something. You convince them it's the best thing for them and you allow them to choose naturally. Peer pressure helps them make the right decision. Also who said you won't let them do sports? Being good at sports increases their chances of going to Ivy league schools.
+1 on the peer pressure. This works especially well with boys I think. Boys intuitively understand that not hitting solid TC numbers makes them beta and less likely to date attractive women - both great ways to motivate them to make the right decision. I'm happy with anything aslong as my children chase TC.
I'd hope that by the time they're old enough for it that sex work would be less stigmatized. Regardless, I'd do my best to ensure they had all the information to make a choice based on how it might affect them, like with any career. Then I'd download all the porn I would ever need so I wouldn't chance running across them accidentally, and I'd support their choice.