Most of the stuff that comes with the OS already uses very little time on the CPU. If you have a sufficiently powerful enough CPU, say a modern i3 or Ryzen 3, I would argue that the time these default programs and services spend on the CPU impacts the performance of the computer in a negligible way. In other words: you have to have a potato PC for this stuff to matter. Even if this stuff totals like <1% of the CPU time when idling, if whatever you're playing can consume the rest of the CPU time, then is it really worth tweaking your OS, which can create potential issues if you dig in deep enough, for <1% extra performance?
Also note that most games don't see a performance benefit beyond 6-8 threads. And eSports games rely heavily on...