I am curious. I love animals and I farm them for meat using permaculture principles, ethically raised and humanely slaughtered. I am open to a frank discussion as to the choices made by vegetarians. I recognize they are as varied as the individuals.
Since childhood I felt it was wrong to kill animals, or use them for our food, but accepted the idea that we needed animal products for health, and it was just the whole "circle of life". When l got to research further, I gave up all meat, but the notion of "protein combining" was still a thing, making it harder to know if I was really the right diet. I was on and off again, more because of marriage, kids, social pressures.
I finally gave up animal products. The research abounds that we do not need animal products, of any kind. We need to supplement B12, as most meat eaters do (although not those eating the animals that graze like yours)
I avoid meat mainly for ethical reasons, but try and stay whole food plant based avoiding oils and sugar as that has been proven (to me personally!) as the most healthful diet.
I don't dispute that just being vegan is going to more healthful than eating as you appartently do-there is a wide span of what is healthy and what is not.
I simply find that especially today where most eat too many calories, too much protein, and not enough vitamins from whole foods, and lack exercise, being plant based is the best thing to do. I see the only realistic future containing the kinds of animal farming you do to be used in small portions for those who continue to eat meat as the horrific factory farming methods are destroying the planet and peoples health at alarming rates