"In 2015, Rep. Elizabeth Scott (R-Monroe) filed a House bill to end DST in Washington, and a companion bill was filed in the Senate.[38] She told a House committee that the semiannual time switches are not only inconvenient but lead to health problems and accidents due to lost sleep.[39] She added that the bill to drop daylight saving time would reduce heart attacks, car wrecks, and work accidents found to increase with the sleep-schedule disruptions."

Does anyone know why this Washington State House bill was not approved?

Change it back to PST. We can adjust our own schedules ourselves.