That's cool. Or rather, very hot. You want to put a high-end desktop CPU in a Mac mini?
So if you need to get a high demand CPU/GPU job done using a desktop......then yes I think most people would want the fastest option.
It is great that Apple does it better in terms of performance per watt, and if you are some extreme enviromentalist or power costs are super high where you are, that will matter. However for most people, using a desktop to do these kinds of workloads, for a living and time is money, they simply do not care about the performance per watt, they care about performance.
I have a large desk at home. My M1 Mac mini, with 27inch 4K monitor is on one end. I do all of my "computing" on it (typing this now) and it is silent and I love that. It sips power with my needs, email, web browser, teams, zoom, VPN into work, Secure CRT/SSH into various devices.
On the other end of my desk is a my gaming PC. It is a 11700K, 3070ti, 64gig, 3TB of PCIE M.2 SSD (1TB boot drive, 2TB drive for games). I have it in a large case, Phantek 500, with 3 - 140mm fans in front, 1 - 140mm rear fan, Noctua 15s CPU fan. While not even close to the Mac mini in terms of quiet, it is actually quiet because those fans are PWM and they never get loud, even after an hour of gaming. The power usage in comparison is off the charts I have no doubt...but I do not care because I want to game.