It's not "just about changing the clock"
I'm not saying we do it for power savings.
The other links are just fear mongering,
All the items listed would seem to me to consistent with increased activity due to daylight at that time providing opportunity to engage in productive pursuits. If that daylight were all 5AM there would definitely be less activity in that hour of daylight.
Actually, that makes my point, the people use that hour in the evening to be more productive by clearly doing more than they would at 5AM...