First of all, this is not apple related problem. If you ever had a thin laptop, they all have issues with cooling, because there is no room for thick strong cooling systems in there. Just no room at all. And apple do not want to release a 3 hours battery life laptop that weight 4kg, so you can pretend to have a "laptop".
I'm sorry to inform you, but physics is something that is objective, regardless of what you think.
Regarding killing chips in the long term, I disagree. I had and seen others with macbooks that last many many years.
And I'm sure what chip to use they are testing and selecting better than what you think to give the most optimal results They do not just take whatever intel gives them, but work out with intel on the right CPU and power available, and compromise where they need to.
Switching to AMD would definitely won't help, considering AMD chips run way hotter.
And regarding the 18 core xeon in the imac pro, it is fine. adequately cooled
So there is no reason to lie about it.
So stick to facts, not exaggerations and "I hate apple so I will talk nonsense and people will believe me".