Consider President Clinton's situation. He is very rich and powerful, and can afford to have any chef prepare him anything he wants. He is very close to his outspoken daughter who has been vegan for many years. Yet it still took extremely serious health problems, his daughter's wedding, and a desire to live to see grandchildren to get him to finally eat a more plant-based diet (but still including fish).
So yes, it is clear that the health argument has an impact on rich, powerful men with vegan daughters, personal chefs, and nearly-fatal heart problems.
While it is, of course, really great to hear pseudo-veganism discussed positively (especially given the absurd attacks floating around), let's not read more into this than is really there. Land animals are in deep trouble if significant changes in diets are going to be limited to rich guys with personal chefs, vegan daughters, and severe health problems.