It's not wishful thinking, it's the ONLY right way of thinking.
Everything IS peachy. Fixing problems is the opposite of what life is about. It's fine as a hobby, albeit a rather dull one (I can think of a thousand other things I'd rather be doing, but hey, whatever rings your bells).
I don't think any rational argument can be made once you bring in the subjective perspective of how a person chooses to lead their life, but I'll play along in any case.
In purely hypothetical terms imagine that within 30 years climate change becomes severe enough that it unavoidably affects my life. For example sake, let's assume that I live in Dubai and Dubai becomes uninhabitable[1]. This would limit me on a daily basis and I wouldn't be able to do the things that I want to do.
If that's not your concern, that's perfectly fine. It's also perfectly fine that I discuss these problems with other people who care about them. If you don't care about this discussion it's always trivial to ignore it.
FTFY
"Everything is peachy" is just wishful thinking.