[filoleg]

For those people, any kind of a generalized take on "how much you can get away with in terms of fitness" wouldn't be helpful either. They will need a way more specific advice tailored to their individual needs and physical limitations.

It is pretty obvious the grandparent comment was just attempting to give a generalized advice, without claiming that it would comprehensively apply to every single niche condition out there (and it would be rather silly to expect it to).