The shock to our circadian rhythm, which would occur equally regardless of whether due to seasonal DST or due to seasonal 1-hour modifications to business hours

The shock to our circadian rhythm, which would occur equally regardless of whether due to seasonal DST or due to seasonal 1-hour modifications to business hours, is responsible for loss of productivity/profitability/etc. But businesses can elect to smear their seasonal modifications with any granularity they want, avoiding severe shock to circadian rhythm, thus avoiding the financial hit! I guess DST could theoretically smear as well, but that is way more difficult for people to wrap their heads around.