Ive been contemplating it and am exploring the lifestyle actively atm.
I do feel the ethics behind it are valid, to certain extent. While I am not opposed to consuming animals (we are predators after all), I do vehemently oppose the way we treat our sources of food. While bio and organic businesses are doing their best to rectify the situation, I fear that economics always tends to win out in the end and the suffering of animals comes in last. Neutering animals without anaesthetics, anally electrocuting them, keeping them in horrendous conditions, and cutting off skin without any anaesthetics, dragging a newborn calf away from its mom the second it is born to be raised in the dark without any light to keep the meat light with the mother left shrieking after her young...
I mean, it aint just about killing and eating them at that point. It is about slavery, misery, abuse and agony. It is about exploitation and inhumanity and the dismissal of the pain and misery of other creatures - chronic pain and misery at that. An entire life's worth of it. Extreme and deliberate objectification and cruelty ftw.
Otoh, there is the health issue. Vegans can most certainly be some of the healthiest people around, but the facts are that B12, zinc, iron, protein and some other nutrients can be an issue. It takes a certain diligence to keep a healthy vegan diet going. There are certain fortified plant milks that contain all these nutrients however these days so all in all, it is certainly doable. And then there is the matter of whether or not your body will react well to it, depending on your own genetic preferences....which is something you occasionally only find out after several years, after your body has depleted your reserves, so yearly blood work is certainly a smart move. It is certainly a lot of work to change over but potentially very rewarding.
Right now, I'm just adding in typical things that vegans eat into my diet. I keep what I like, I chuck what aint for me, and I keep an eye on which nutrients Ive had that day. So far, Ive discovered plenty of benefits and exciting new ways to enjoy food. Im just going to see how my body responds and feels as I go along. If it turns out my body does crave meat occasionally, I might go for wild salmon and chicken eggs from a local person who keeps chickens as pets or something (or even get my own chickens at some point). So I'll be trying out if I can make the shift, for myself.
There is also an argument to be made that going vegan is probably one of the best things you can do to help out with the climate change and environmental problems we are faced with as it takes up humongous resources such as water, and produces a massive amount of waste which releases methane gas into the atmosphere to raise this much cattle as you have to both grow the crops to feed those animals and deal with their waste disposal to get the meat you want.
That said, as Im doing this, I can totally understand why people are unconvinced, afraid, unwilling, uninterested and unmotivated to go through this type of change as it is rather overwhelming and a massive lifestyle change, especially if you were to do it cold turkey. Not to mention that it does often also generate problems for social situations and general awkwardness wrt judgement and heated debates with your loved ones. Ive felt strongly for a long time about this, but did always chicken out due to convenience, uncertainty as to whether it was sustainable and whether I had the willpower to actually change as well as the social peer pressure you endure. And I have a strong motivation to actually attempt this.
In short, it aint something one can or should force onto someone else, as it is ultimately their decision and right to choose.