I actually tried it before for my TV PC that I wanted to also use as a miniserver, with gpu pass through and everything. It was painful to get it working properly, was like 30-40% slower. I also had constant problems with USB peripherals not connecting properly, or going in a sleep state and not waking. Many games didn’t work properly.
Then I decided to just buy a cheap second second hand PC and never looked back.
The problem would be solved if these scales would take a AAA battery which has a lot more capacity than a tiny cell.