This author has "a masters degree in public health from the University of London School of Hygiene and Tropical Medicine as well as a background in infectious diseases and vaccine development." They are not literally at somebody's deathbed trying to prevent them from dying at this moment.

So really, here's the comparison: 647,000 Americans die from heart disease each year. Do I think doctors should be afraid to talk about obesity because it might turn people off listening to their other recommendations?

No, listen to experts.