It appears you think that theories that account for facts that people can't easily observe are worthless? This would be a large majority of the work I do every day and let me assure you that when I diagnose a neonate with a hearing loss, a neonate which is then given early intervention, it makes a huge impact on their life. Even if you don't understand the technology by which I make the diagnosis or the theories underpinning it.

It's nice that evolution is so easily understood by lay-people. But this is an exception, not the rule. Most discoveries that I read about as part of my job would not be understandable by most people outside my field. However, they do have a significant impact on the world.

Don't mistake your inability to understand climate change (don't feel bad, I don't understand it either) with a climate scientists inability to understand climate change. Don't just assume that because you don't fully comprehend something then the people involved must be obfuscating, and involved in some nefarious political conspiracy. I certainly am not.