The answers are quite sad but simple. We rely on a thing. As a society our entire society is built around it. Regardless of why. We later find out that thing

The answers are quite sad but simple. We rely on a thing. As a society our entire society is built around it. Regardless of why. We later find out that thing is bad. Lots of rich people will lose money and entire cultures have to change. This won't work. Deny. If the problem will hit us in 50 years then we can procrastinate till we're dead. Then someone else will panic and deal with it. The problem is there's no easy solution to this. None. It all takes decades to have an effect. And thus the problem.