So why can't health care be a single issue?
Because it isn't a single issue. Healthcare is a huge umbrella, and ranges from mental health care provision, through to someone going into someone's home to change their bandage everyday- and everything in between. To count it all as a single issue doesn't account for the fact that it's actual people involved, encompasses a huge breadth of provision, and the issues etc will vary immensely.
If I had a community nurse visit daily for example, my needs would be very different to someone who has just been sectioned. What provision would you say was fair? If the nurse cannot visit me in my home anymore because of the risk, do we then just withdraw medical care from the person has been sectioned too, as it's obviously all the same singular entity? Do we all go without because it's not possible in one area? Of course that could be argued to be the 'fairest' way, but as anyone who has worked in healthcare knows, life isn't fair. And justifying not doing something because of someone else isn't fair either, ie well they aren't allowed visitors we will justify no one else being allowed them either by saying they would be annoyed.
If people are concerned about other areas which is understandable, why not start a discussion about it? Engage your MP?