Right at this point in time, if you can afford to add parts C: and D: when you reach that age, it will work like insurance. However for a program that you pay into all of your working life and still face premiums when you retire, it's not worth a **** unless you add parts C: and D:. (though some Part C plans include prescription coverage).
It has not always been that way. When I first joined the work force, I barely noticed the payroll deductions for health insurance. Health insurance gradually became prohibitively expensive over two primaries causes, government tinkering with the healthcare system and out of control frivolous medical malpractice lawsuits. The more the government tinkered, the more expensive healthcare has become. Ultimately the only fix is returning healthcare to market forces rather then government edict. When that happens, competition will bring the costs down. And once again, while your parents like Medicae, if we go single payor, that is what everyone will end up with, however with the entire adult population on Medicare, the costs will rapidly rise to the point to where you are paying the same ultra high premiums you are paying now.......and for rationed healthcare.