What you say is a true fact!
2 kHz is at about (just shy of) C three octaves above middle C, as you very likely know. Although as I recall you play bass.
2 khz pretty high up there but still a discernible and useful pitch. However, it’s also worth noting that our hearing is extremely sensitive in that area (& even more the next octave up), as I understand it in significant part because of how our ear canal is shaped, and there are a lot of harmonics of fundamentals up there, resulting in how we interpret timbre as opposed to pitch. So I think it’s still a pretty critical area for loudspeaker performance as far as fidelity goes. But I am very certainly not an expert.