Can the haptic feedback level be lowered on the ForceTouch trackpad for MacBook Pro?
According to Apple's support docs and as also noted by several reviews, the late 2016 MacBook Pro does not have the "Silent Clicking" option offered on the 12" MacBook and the Magic Trackpad 2. 

(As an aside to ward off disappointment, Silent Clicking is not completely silent anyway: the actuators still trigger to generate the haptic effect and thus a small amount of attendant noise.)