What do you suggest we do instead? "Nothing" isn't very good for the future of mankind either.
Humans acting like gods never ends well.
You've got a completely wrong take on the matter. And when I say wrong, I mean
really wrong.
The real solution (as everyone who is educated on the matter) is to not act like gods, but to do less. Less means less pollution, less suburban sprawl, less population growth, less resource extraction, less consumption, less deforestation, and so on. That's not acting like gods. That's being informed, and unifying the public on the matters.
How are you going to go about implementing your nature protection suggestions? Persuasion or force? Education or statism? Individual choice, or authoritarian central planning?
You see I'm not going to discuss your views on proper stewardship of the environment, you will probably have the upper hand in that knowledge department, but I will definitely defy you every step of the way if you think you're going to lord over me by participating in the rampant theft and plunder of private land so you can have your utopian nature preserve.
Some of the science is questionable, some of it is not, but your implementation methods are definitely what's at stake here. I could be the smartest "god/man" on earth, but I'm not about to make you my serf, subject, minion, or liege because I know what's the "best" use for your land.