This whole thesis has extremely cherry-picked data points. Just off the top of my head, pharmaceutical companies don't make B12 supplements.
Secondly, being concerned about honey bees but not cows, sheep, pigs and chickens is very strange. I don't want bees to die, but there are more honey bees on Earth now than ever before, they are not endangered.
Deforestation is not good... but far more deforestation happens to farm soy to feed cows than for anything else.
Claiming that vegans are dependent on industry while ignoring all the industry around meat and every other source of our food is also super strange.
If you want to eat meat, then eat meat, no one is stopping you. There are health risks to eating meat, there are health risks to being vegan, but one is definitely better for the planet than the other.