Circadian rhythms have become simple to manage with cheap smart lamps. A daylight bulb that fades on to coincide with summer sunrise times is trivial to setup, and easily solves the problems the "sleep experts" are talking about. Artificial lighting is easy to install in bedrooms.
It's a little harder to illuminate all outdoor spaces to keep the sun from setting in the early afternoon.
It's easy to add retro reflective details to kids clothing, lighting them up like Christmas trees whether they are out before sunrise or after the streetlights come on at 4 o'clock in the afternoon. It's a little harder to brighten playgrounds and metro parks and hiking trails and soccer fields and sledding hills to make them safe enough for the kids to use after school.
Afternoons are the only time slot kids have to engage in outdoor activities. Stealing those hours of daylight from them is child abuse, and is largely responsible for the obesity epidemic.
TL;DR: Standard Time makes you look fat.