No there aren’t. Because if you know how McD’s runs their business you know how fast service works, you know how franchise businesses work, you know how pricing works (the BigMac index is actually quite fascinating), and you learn a lot about the meat and potatoes of capitalism. Never too old to learn, never too old to grow.
You have your interests, and I have mine. Wasting my last years on learning something I have no interest is, would be time I could never get back. Let me spend my time as I like, at least until the commies take over the country, and then we won’t have to worry about how capitalism works.