The thing that really irks me about DST arguments is that people assume that business hours are unchangeable. If 9 to 5 was permanently changed to 8 to 4, you get that extra hour of "leisure time" without a clock change. You are already adjusting your morning times twice a year. How about adjusting it once for the rest of your life without endangering the walking/bussing school kids.
Core hours at my place of employment are 7 to 3, which was probably an adjustment for international interactions already in place. Flex hours still have people starting at 8 or 9. They only emphasize core hours if you flex in the other direction too often. i.e., get off at 1 or 2 PM.