Because its a hobby and they can.
If I had unlimited funds and time to do nothing much else, I might even be crazy enough to do it but meanwhile I sweat out every dime I spend because like you what I have fits my quite demanding needs in most every way these days and its hard to justify spending more what with a kid to still go to college and all.
Still it did take me many years and over 5 digits invested in hifi gear total to get to my current happy place, so there you go.
If I had unlimited funds and time to do nothing much else, I might even be crazy enough to do it but meanwhile I sweat out every dime I spend because like you what I have fits my quite demanding needs in most every way these days and its hard to justify spending more what with a kid to still go to college and all.
Still it did take me many years and over 5 digits invested in hifi gear total to get to my current happy place, so there you go.