Actually what he advocates is that people like himself who are worried about the issue and can afford to, invest and fund the research that will hopefully eventually lead to these technologies becoming affordable. He doesn’t advocate them being forced on anybody but most new technologies are expensive to begin with and become cheaper over time with further study and investment.
I have had to sit through dinners where I’ve had this explained to me (that also showed off the products of his sustainable agriculture, some of which were really very nice).
Link?