It's nutritious. Instead of carefully observing some diet you can eat some beef and buckwheat or cabbage or beans, and you're good.
That said, I eat meat so rarely that my relatives worry, mainly because it takes some time to cook if you boil it, and I'm lazy and unorganized, and frying it has the potential of, eh, leaving the kitchen for 5 minutes which turn out to be half an hour and returning for the smell.
Other than that people can't care about every problem at once.
No, they don't. I used to smoke, nicotine is a fucking bitch of a drug, somehow I managed to quit using vaping and nicotine gum over 2 years. Beef is not an addictive chemical. You must never have experienced nicotine drug, what a naive ass comment to make.