>[T]here is a discrepancy between your biological clock and social clock, which researchers refer to as “social jet lag,” Dr. Roenneberg said. Permanent standard time is closer to the sun’s natural time so social jet lag is reduced, he added. “Daylight-saving time means that we virtually live in another time zone without changing the day-light cycle,” Dr. Roenneberg said. “The problem is the misalignment."
Which makes sense on its own, but it doesn't account for the variance within time zones. A Chicago resident experiences sunrise and sunset about an hour earlier than a resident of Lubbock, Texas, even though they are in the same time zone (Central). So you can't really say that Standard Time is the one-size-fits-all solution -- and indeed, the Illinois Senate just passed a bill [1] to make DST permanent in that state (although it is hamstrung by the same federal regulations that other states face after passing similar bills).
[1] https://www.illinoispolicy.org/illinois-senate-passes-bill-t...