Assets are typically inherited long after the income generating years have been determined. You could argue that the promise of high likelihood of a future inheritance event affects choices (and I’d agree that a positive effect), but I think most people receiving inheritances of notable size are middle-aged.
It's just as likely that proximity to these characteristics is sufficient. As heritable as those might be, inheritance of assets is protected by law. What more heritability is needed?
> People are allergic to the idea that outcomes have something to do with heritable characteristics.
Heritable only through learned behaviors, imitating family. Too many playboys squandering grandpa's hard-earned wealth to think otherwise. The right lessons just weren't taught for some. Positive personality traits do relate to economic success, but too few who have those have the parenting skills to transfer those to the next generation. Their genes certainly aren't doing the heavy-lifting.