I would hate having a global Heating and Air Conditioning unit

I was talking to a friend recently that is convinced that global Heating and Air Conditioning units are the future of the Heating and Air Conditioning industry, even though I had to tell him that I strongly disagree with him. At least, I truly hope that global Heating and Air Conditioning units are not in our future. I can see why people would propose for a global Heating and Air Conditioning unit. Right now, the people I was with and I have a major problem with the Heating and Air Conditioning industry. Every home has an Heating and Air Conditioning unit, and most of the Heating and Air Conditioning units that Heating and Air Conditioning manufacturers are developing are not great Heating and Air Conditioning units. These Heating and Air Conditioning units have to be fixed by Heating and Air Conditioning companys, and there are too many Heating and Air Conditioning units and not enough Heating and Air Conditioning companys in our world; Furthermore, there are billions of people that live in poorer countries that cannot afford the nicer Heating and Air Conditioning units that the people I was with and I have or even Heating and Air Conditioning units at all. Rather than buying Heating and Air Conditioning units for people and forcing them into a position where they cannot afford to use these Heating and Air Conditioning units or maintenance these Heating and Air Conditioning units anyway, people are talking about building a large Heating and Air Conditioning component that could control the temperature and weather of the entire globe. I suppose that this is a exhausting idea. Here is why. If Heating and Air Conditioning units, in general, are made cheaply and to cut down, then how can the people I was with and I trust the Heating and Air Conditioning companies to put the time and money into building a quality global Heating and Air Conditioning unit. Also, how would the people I was with and I afford to pay for this Heating and Air Conditioning unit? Our taxes would skyrocket to take care of this Heating and Air Conditioning unit. Furthermore, who would be the person to decide the temperature. The two of us can’t agree on the temperature in our own home among our family! I am sure that someone from a different country might disagree about Heating and Air Conditioning preferences with me.
Heating technology