More likely to report is not quite the same as more likely to experience. The groups they name are the ones that are already more likely to be bitching about something or another. As white male heterosexuals, we are not allowed to complain because toxic masculinity and white privilege.
Most likely because those groups probably are usually employed in shift work with an alternating schedule.
They also fail (maybe I missed it) to mention that some of our most critical professions such as medicine, law enforcement, fire services, and the like are also subject to jobs which take a toll on sleep patterns. Those workers are not immune to the problems associated with lack of enough sleep. Somehow it is just assumed they will be shielded from it because of higher pay and better education.