Too many Safety features can lead to disaster

Too many "aids" will clutter a person's ability to pay attention and make decisions. If you have to act on each "aid" to decide if it is really important to you right at that point in time - and recognizing the one important item out of a flood of aids warning you of multiple issues - it then becomes distracting and people will learn to ignore them or usually just turn them off.
Like the UAC that came with VISTA - too many times it bothered people to do the simple things so people quickly learned how to turn it completely off. Too many "false negatives" and people will distrust it. That has always been the case for any type of technological aids to a task.
There are great videos of people going into landing with an ear wrenching warning alarm going off in the cockpit that they turn off or simply ignore since it was distracting them from concentrating on the landing . Course it was the landing gear warning sound that the gear was UP!