I would also add prescription eyewear to that list. These are not optional costs when you need them, and cause bigger problems when ignored. So why is it being left to employers, as if it's an optional benefit? The government is saying it's an acceptable level of health to not be able to see.
Let's leave the truly extended, non-prescription services, like massages, to companies to provide as benefits.
Do you want to deal with a person's psych problems or pay for their psych care?