yes you do. For competitive shooters, every few millisecond may count. We try to reduce input latency as much as possible and reduce graphics to its minimums to achieve the highest possible framerate and lowest possible frametime. Thats why 240hz+ monitors are so common in Esports these days.
But for MSFS, i just cap at 30 FPS and enjoy a SMOOTH experience with ultra graphics. 
If you really want to dive into the topic, this video is for you:
