If the average person cared enough there would be political pressure on those higher ups. Looking at how people vote (not just thinking about US here) I'm not convinced people care all that much.
The impact of a single active voter is not big, and especially in a country where there is limited passive voting, e.g, a 2 party country like the US, it is hard to impact a change.
In this sense, US democracy is broken compared to the Netherlands, as there is very little room for passive voting other than being part of a large existing party.
In Sweden the green party is dangerously close to getting ejected from the parliament. They need +4% of the votes to stay. The issue for them have been that they had to make a lot of uncomfortable compromises to have any influence at all. Feels like that is the fate of any party that wants to have any kind of progressive agenda. Death by a thousand compromises.
No, all of those things are immediate dangers to your ability to survive. Add to that the constant threats that terrorists/immigrants/communists... are "coming to destroy our freedoms/way of life" and people have so many more (both real and fake) threats looming over them that the distant and (to some) uncertain threat of climate change is basically at the bottom of their priority list.
So, while this solution must be pursued for sure, at the same time we need quicker actions on those issues, and the quickest way is to deploy them at the management/politicians/law levels.
I live near a bus stop, there is a trash can. You'd think people would have the common sense to use it. But not so, they would rather throw it behind the bus shelter.
I picked up three bin-bags of litter last night. I do this daily.
Joe Biden got the US back to the Paris agreement, I hope that changes something for the better.