This is the problem with democracy (and why I don't run for office).
The right thing to do is rarely politically feasible.
There is a self-organizing principle here: People will select for what they think is in their best interests. At some point, they may find that what satisfied their previous self-interest is now working against it and they will shift.
This could, of course, lead to a "Too late" situation, so it is the responsibility of leaders to impress upon the populace how they might initially be wrong. Obviously that hasn't happened and it's absurd to argue that it's only because the forces of "Climate Denial" have been more potent.
If you want to make people sacrifice here and now to prevent a future problem you can't screw around with data and have your foremost proponents present themselves as obvious hypocrites.
If Climate Change proves to be as devastating as the doomsayers predict, I will blame the voices arguing for necessary changes. They had to expect opposition and they have provided that opposition with all the ammo it needs.
Anyone who believes Climate Change is truly an existential threat to humanity doesn't live in 10,000 sf homes or fly private jets everywhere. When the average Joe sees them doing so he is perfectly reasonable in assuming they are phonies.
There is nothing that the common man hates more than elites telling them do as I say not as I do.