Even on a site like HN, where rational and logical thinking is held in high esteem, and where few could be suspected of climate change denialism, a factual statement such as this one from the article:

"On average, animal-sourced foods are associated with eight times more carbon loss and 14 times more biodiversity loss per calorie than plant-sourced foods."

is very likely to be countered by listing personal preferences, anecdata, concern for vegans' health or mockery of that lifestyle choice, and generally nitpicking.

Honest admissions like 'I am part of the problem and will maybe try doing something about it' are very rare.