My mechanical keyboard (Razer Huntsman V2, linear keys) is quieter than most membrane keyboards. Loud keyboards of any kind don't belong in shared offices.
Unfortunately the hype around mechanical keyboards is mostly around clicky and tactile keys, to the point that there's almost a stigma around linear or silent optical switches, for example. Further, it's not just the switches that make the noise, your key caps and case also contribute to an extent.
Of course, but there are various options out there. For instance, Razer Huntsman Elite is loud enough to wake the dead, whereas Razer Huntsman V2 (linear) is whisper quiet - complete opposite.
Personally I prefer mechanical keyboards and other gaming gear not because of flashy LEDs and other fads, but because of the durability, build quality and features. Seemingly little things like volume wheel on the keyboard or tilt wheel on the mouse, can ad a lot to comfort of use.