"wage theft" in general includes things like forcing employees to clock out before the end of their work or clock in after the start of their work (e.g. "first clock out, then do this long procedure, then you can leave"). People "opt into" those jobs too, but that doesn't mean they shouldn't get paid for all of their work. It's not unreasonable to draw a parallel to commuting, and when the alternative is work-from-home, expecting to get paid for commuting seems perfectly reasonable.