Cheese - milk, salt, rennet/vinegar/lemon juice, bit of heat, water.
Meat - bit of an animal. Heat applied, maybe some salt, pepper of dried herbs & spices.
Milk comes from other mammals (it's kind of the point of the name) - most frequently in Europe from Cow, Goat, Sheep or Buffalo. So no bovine protein in 75% of those. And none of them have breasts. Udders, teats, mammary glands, but no breasts, which are primary milk production AND secondary sexual organs that humans have.
Most meat is from animals that aren't old enough to have developed cancer in any case.
Eggs - they're eggs. Break, apply heat.
Honey - direct from the hive, filtered, possibly pasturised (heat applied).
Oysters - opened. Not even any heat applied. Other seafood - usually heat applied, shells removed.
The one thing an omnivorous diet doesn't have to be is highly processed. All you need to is make something dead or collect the items and cook them.
A comparable vegan diet in terms of processing would be purely vegetables and salt, plus some fruit.
You do you, but don't confuse simple cooking with complicated manufacturing processes to justify your moral stance.