Yeah for headphones i can relate, while i can hear the difference, after about 5 minutes of listening I no longer care and most headphones are good enough for me.

With my monitor i instantly feel whenever the 280hz mode fucks up and drops to 240hz even though it should barely make a difference. I tested it out with some friends and some couldn't see the difference between 120 and 280 while I can pretty much spot on tell what refresh rate im running except 144 vs 165hz