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Alright, if we're in low-effort territory here, I'm just gonna quick-fire these off.

1. Why are you not using an adblocker?
2. Are you allergic to books? Okay, here's the entire list of scientific studies cited in that book. All 8000+ of them.
3. It's not a misquote, that's just not relevant information for what the article was trying to convey, and the need for taking b12 is implied by "well planned." Also, if you have a basic understanding of how b12 is formed, you'd be stupid not to be taking b12 supplements anyway. No diet in our present environment can reliably supply b12 from whole food sources - and odds are you are taking b12 supplements anyway, because in many cases the animals you eat were fed supplements themselves.
4. That's really just your personal opinion of what you claim to have read about vegan diet studies, which doesn't say much since you have already made it clear you're extremely biased and don't like reading. Also, "such as people who eat vegan carefully planning their diet and wanting to eat healthy" - so you're admitting that a vegan diet is healthy? Also, you are clearly not familiar with any vegan communities, because junk-food vegans are prevalent.
5. Dietary science is incredibly complex, and there's a vast amount to learn still, but no it is not unreliable. Nutritional science is imperfect, and deeply impacted by corporate corruption, but still very much has a solid core. What's most unreliable is people actually following the recommendations of the scientific consensus, or even being able to begin learning what that is through all the noise of corporate propaganda which basically comes from the same stale playbook as the tobacco companies, and climate deniers, such as the garbage talking points you're spewing right now. I hope you're getting paid for this, because otherwise it's just sad.
6. Umm, no they don't do that? Science is how we understand edge cases like food allergies, lactose intolerance, celiac disease and other autoimmune disorders, and every other nutritional edge-case that sometimes needs to be accounted for. But yeah, sorry, but humans are all made of a very similar biochemical make-up - there is an overall dietary pattern that fits most of the human population. (To be clear, if we're talking about nutrition alone, the scientific consensus leans most strongly in favor of the Mediterranean diet, which is not a vegan diet. But a vegan whole-food plant-based diet can fit that pattern just fine).
7. Aside from that fact that with enough volume of evidence, no you don't necessarily need everyone to have the same genetics, there are other ways around those variables; same genetics? You mean like this study on twins which found that a vegan diet improves cardiovascular health?
8. Yeah there are often sample size problems in vegan studies, I'll admit that. That can be worked around, but best way to solve that in the long term is for more people to go vegan.
9. Dude, are you indigenous to Australia? Cause if not, you are literally hundreds to thousands of miles away from your "ancestral" diet, smh. But aside from your diet probably not being healthy, considering it contains animal products, it sounds more like you would rather just keep your head buried in the sand and not care about the fact that your "ancestral" diet is dependent on the industrial-scale systematic confinement, forced genetic modifications, torture, sexual assault, and slaughter of billions of sentient beings every year; something that is also one of humankind's most environmentally destructive endeavors, and continually creating conditions for one pandemic after another.

Giving up animal products is one of the most important, impactful, and meaningful decisions you have a chance to make, and the only thing getting in the way is your own prejudice and devaluing of other living beings.