Yes, the sexual issues, harrasment or otherwise, are the reason he has trouble doing presentations in high schools.

The childless issue is what makes this so important for him personally, otherwise I believe it wouldn't have been so pressing a matter for him to engage in a crusade. It's his chosen way to engage with the new generation, and he has lost access to it.

It's incredibly creepy for you to so confidently make such accusations about his state of mind and problems and motivations without evidence. So what is it?