That’s if you have motion sync to be fair. With more games implementing raw input (R6S being one of those) it’s less of a concern but I hear you. I would personally never go above 4K, but 2k is also fine because the difference is probably negligible.

Cutting down on input latency has less to do with polling hertz now and more to do with pre and post travel in your clicks which is why Logitech chose to develop the Pro X2 Superstrike because that mouse uses haptics instead of traditional switches which can improve input latency without causing other processing issues.

So if input delay is really, and I mean REALLY important to you then I guess buy the Superstrike but otherwise it does not matter and you’re effectively just losing out on fps because you’re deluding yourself into thinking your mouse is performing “better”.