I would say those are hard and seemingly-neglible-impact things, and that's why the general populace don't do those sorts of things. I see a parallel with being afraid of flying but not driving; people are not very rational or good at assessing impact. There's no reason not to change our habits, further, there's a positive feedback loop for vegetarianism: more consumer, more products, more consumers.

If you want to apply your skills come up with ways to help people change their habits. Better mass transit (ride-sharing etc.), new low-impact comsuption choices (e.g. digital goods/experiences), apps to help eat or live greener, better food production...