My two M7 are not defective. I feel my cameras to a deep level and they just do not function the same in electronic shutter mode as in Mechanical shutter mode. There is that lag, and I am not the only one to feel it.
Maybe after 30 years of shooting, more than 2 million digital shutter actutions, and more than 10’ high of stacked film negative sleeves, you too will feel the clear difference.
I never use a shutter button except on the M5 on occation. The shaft will get bent only if the camera is dropped on that button, otherwise it’s fine.