If you're working at the mall selling clothing that's pretty unlikely. In my former life in publishing, that was pretty unusual.
It's a cultural thing and it's not strictly relegated to tech, but it's not universal. Plenty of people have reliable 9-5 jobs, Monday-Friday. That's a lot easier to reconcile with parenthood than when there's a huge release sprint and they expect you to work from 9 a.m. Friday to 9 a.m. Sunday or whatever.