You're extremely ignorant. Please don't say shit if you don't know what you're talking about.
https://www.ncbi.nlm.nih.gov/pubmed/19562864
"It is the position of the American Dietetic Association that appropriately planned vegetarian diets, including total vegetarian or vegan diets, are healthful, nutritionally adequate, and may provide health benefits in the prevention and treatment of certain diseases."
http://www.thepermanentejournal.org/...6192-diet.html
http://i.imgur.com/Xygnetb.png
Tons of doctors recommend plant based diets, even the President of the American College of Cardiology is a vegan.
A plant based diet is probably the most healthy diet out there if done correctly. The myth that you need meat, eggs or dairy has been debunked, did you get that from watching TV commercials from your local dairy association? There's also ton of jacked vegans out there (I personally do powerlifting and there's tons of youtubers as evidence), no not all vegans are skinny malnourished like the stereotype would make you believe. No, meat isn't a magical thing that humans need. You can get your protein from plenty of our sources.
"The ethical arguments are rather weak" What? If you think modern slaughterhouses are ethical then you are the ones with questionable ethical values. Especially since now the only reason to eat meat is for "muh taste, muh bacon", there's no other justifiable reason. So if you think what is happening in slaughter houses is fine just for your pleasure (taste), than yeah you have seriously shitty ethics. We don't need meat to survive, if we were in the wilderness and had to eat a steak to survive, then it would be another question.
There's also the environmental reasons but you probably don't care either.
It's hard to convince people since it's so ingrained in us that eating meat is the norm. I mean, back when slavery was a thing if you asked the average joe, he would tell you slavery is perfectly fine. I wouldn't be surprised if in 50 years or whatever vegan becomes the norm, because the meat industry isn't really sustainable for the environment. Plus it's growing every year. Vegan diets really are superior health wise, ethics wise and environmental wise, the evidence is there if you care to look for it, if not you can choose to.
I hate when people make bullshit excuses and make up stuff to justify them eating meat. Honestly, just say it, you are too accustomed to it and like the taste, and are too lazy to change. No need to sound like an idiot and make shit up. For example Joe Rogan who has a problem with vegans for some reason, literally convinced himself that plants are conscious and feel pain too, so it's equally as bad to eat plants. I mean, really? People will invent the dumbest shit to justify themselves.