That’s not true. Ask Qualcomm engineer that works in QCT or any Broadcom engineer that is in Rancho Bernardo or Intel engineer that works in Rancho Bernardo or many of the tech startups here or many of the defense contractors here (the ones that are left).
I know more defense contractor types than QC/BC people, and the former seem to work fairly normal hours. Just driving, I’ve also seen “rush hour” as being basically done by 6-6:30 pm, meaning that people leave before 6 pm.