Any extreme causes problems. They separate people and cause the US and them problem. Plus they never solve any problem anyway. Animals are abused because of profits. Eating them is normal it is the way life is. But doing what we do now is not. But the same problems would happen with vegan things too if it got large.
It costs more for organic stuff and vegan stuff costs even more. That keeps it from really competing with a normal way of life.
You can convince yourself that not using leather will stop cows from getting slaughtered. But it is just a byproduct. Not using it will just mean something else is used in its place. Like plastic. That will never rot and uses oil to produce.
Going for extremes are a choice but all you have to do is look in the past to see it has never worked it only causes problems.