There are too many factors involved to mention here but there is one common denominator, mentality !
Natural common sense mentality is being expunged as soon as kids enter pre-school. That insidious trend needs to be stopped. We need intelligent people not indoctrinated leftovers come out of our education facilities !

It's worth remembering that Cruise Control (in one form or another) has been a feature of some motor vehicles for over a hundred years, so it's not much of a problem.

ismise true, however think with me on this, do you think no one ever, will relax that bit too much because of it
Indy yes too but people do walk in to man holes poles and even out in front of cares at pedestrian crossings
Is there ever reason to use one even text while driving?

but people do walk in to man holes poles and even out in front of cares at pedestrian crossings
Belly,
Yep, that sort of thing is now beyond a joke. People simply stop thinking as soon as their phone beeps.
That's why I'm such a strong advocate for a National Service where young people can purge the indoctrination from school & Uni. Two years among normal people will restore much of the common sense that was denied to them as part of education.

Belly,

I don't think that anyone is going to go to sleep or relax too much because of cruise control.
People go to sleep because of tiredness and the fact that ones' right foot is on or off the accelerator pedal isn't going to make a difference.

It might even be that cruise control lessens the reaction time in braking as the foot may have less distance to travel to the brake and the mind doesn't have to cease one function to initiate another.

Perhaps only a fraction of a fraction of a second but that could equal one inch of stopping distance; the difference between a hit and a miss.

Of far more danger are hand throttles and most of my vehicles have one,

I don't think that anyone is going to go to sleep or relax too much because of cruise control.
Is Mise,
Better think again !