[I made a really detailed reply and it went somewhere else - into the ethers.]
The number of people who choose to eat too much or drink too much is so much larger than those who choose to indulge in same sex acts which cause disease that it can't be compared. If the people indulged in same sex acts increased their number to equal, for instance, the number of people abusing alcohol we wouldn't have a civilization any more.
I was more interested in pointing out the context of my statement and I hadn't thought of that angle, thanks.