There's an even simpler, more effective way of checking blind spots: Actually turning ones head and looking over the shoulder. The "blind spot" doesn't exist when drivers exercise proper caution and responsible driving behavior. Of course, expecting this of drivers is unrealistically utopian. Nevertheless, a "blind spot" is just another excuse for unsafe drivers.
I completely agree with you, but technology is encouraging us to 'rely' on it's helpful beeps, alerts, and flashes. Soon we will have trained an entire generation to 'drive-by-sensors' and not senses.
I honestly believe that driver safety will approve more rapidly when that happens than ever before.
I trust silicon more than I trust meat.