Is that really true? I don't have any intricate chip knowledge, but it rings false. Whether ARM is coming from a phone background or the Xeon from a server background, what matters in the end is the actual chip used. Maybe phone-derived chips even have an advantage because they are designed to conserve power whereas server chips are designed to harvest every little ounce of performance. IDK a lot about power states in server chips, but it would make sense if they aren't as adapted to rapidly step down power use as a phone chip.
Now, you might be happy with a hot leaf-blower and that's fine. But I would say the market is elsewhere: silent, long-running, light notebooks that can throw around performance if need be, you strike me as an outlier.
Pro laptops should have a beefy CPU, great screen, really fast SSD, long battery life, lots of RAM which (presumably) your notebook features, but the new M somethings seemingly as well. But in the end, people buy laptops so they can use them on their lap occasionally. And I know my HP is getting uncomfy hot, the same was said about the intel laptops from Apple I think.
Apple doesn't need to have the one fastest laptop out there, they need a credible claim to punching in the upper performance echelon - and I think with their M* family, they are there.