I only partially agree. I agree that no drastic changes are necessary, such as “debloating Windows". However, Windows 11 is not really optimized for gaming “out of the box” as you put it. A good example was given by @Drewmorkuzy There are Windows settings that are worth disabling or changing their behavior for gaming.
That said, this thread isn’t about Windows 11. If we want to discuss Windows 11 and its impact on MSFS, I’d suggest continuing the discussion in the topic below:
Windows 11 25H2/24H2 and MSFS: observations,insights, issues and tips - Discussion Hub / General Discussion - Microsoft Flight Simulator Forums