IIRC, that was only an issue in 1973-1974 when the US government tried year-round DST (permanently setting the clocks forward one hour). The consequence of this was that the roads in the morning were still dark due to the sun not rising until ~9am during winter, which compromised safety for schoolkids.

If DST was abolished, school safety wouldn't be affected much because the sun would be rising even earlier from spring to fall, and sunrise time would be unchanged in the winter months.