So if the same person is opening and closing, what is everyone else doing? If you're going to saddle one employee with an important duty, you better have adequate compensation and opportunities.
There should be one person doing those tasks for most companies - the owner- who retains a lion's share of the surplus value created by their workers.
Employees don't owe the business anything other than their contracted labor. We are just still suffering the inertia of class traitors in the enormous Baby Boomer cohort, who made the work their entire identity, and who frankly love the taste of boot.