Again... a warmer world will be a wetter world. A warmer and wetter world will be a greener world. A warmer, wetter, greener world is conducive for life. Life will thrive.
If the earth was one single homogenous climate and it was completely controlled by the greenhouse gases you would have a point.
Given that the current earth is
nothing even remotely like that makes your point meaningless.
Perhaps you can outline your "model planet" where there are no other factors that impact climate and cause variability across the globe to hypothesize your ideas. But for the time being I'll stick with the actual EARTH.
Let me put it this way:
If I say the AVERAGE height of a kindergarten kid is 40" and children grow over time. The average height of a high school kid is 68". Do you HONESTLY think that all the children grew at EXACTLY THE SAME RATE? Of course you don't. That would be the most ignorant thing anyone could think. In fact
there may even be someone in that class who didn't grow more than a few inches!
That's what we are talking about here. The global
average temperature is what is increasing but LOCALLY some places will get warmer and wetter and
some places will get cooler and drier.
That's how climate works.
I have already outlined one example which you do not wish to address, but it is quite real and explains everything I'm trying to say to you.
So may I ask why you are acting as if the earth is a super-simple system with a coherent global climate that is the same everywhere?