If we are past the point of no return decades back, what are the current goal of talking about it now? Our social and economic structures, and life styles are also well past the point of no return. Energy and resource consumption is at vulgarity levels. We bring a 10 ton machine from 10 miles, to sweep a floor of 10 square foot area. That's us. The expectations are set, supply chains are set, global domination goals are set. Science is only a force to drive us towards these directions. That's our choice made.
You asked whether there anything humans should do about it other than adapting to it, and the answer is yes. And we may be past the point of returning to some baseline (it's interesting that you took one person's opinion that we are as if it were an established fact) but that doesn't mean that we can't possibly hold the line at some higher level.
> Energy and resource consumption is at vulgarity levels.
That sounds like a very good reason to be talking about it.
> Science is only a force to drive us towards these directions.
This is not at all true. And given your original very uninformed question about "natural cycles" vs. human causes (which is quite the false dichotomy), I don't think you're any sort of authority on science.