Depends on the country, but overall I'll say the opposite is true: cheaper is to ignore it. Climate change will not stop even if Germany switched to 100% renewables. And globally it is also not a top priority.

Basically this. But he is probably rich enough to not care because the effort that will be asked of him will be small relative to his purchasing power.

So, he can pretend to be "good" for doing the right thing, while more unfortunate people will pay the real cost without any guarantee that the climate situation will improve and that their children will have a chance at a "better life". Not that they care that much because children are becoming unaffordable for much of the lower class.

The problem with the green ideology is that it's a global problem and clearly global fossil fuel use reduction isn't happening. And the countries using it don't care because not using it is much worse than the promise of a better world in the future. If your life is shit right now (compared to the rich world) the promise of a better world far out in the future is just propaganda.