You don’t know what the word regular means. It does not mean acceptable or morally correct. It’s synonyms include “standard”, “usual”, “typical” etc. It does not imply anything other than than. Dairy milk is the usual, typical, standard substance that is referred to as “milk” by 99.9% of the English speaking world. So you’re outrage is misplaced, perhaps you should direct it towards some sort of activism, get things done, change hearts and minds, save the cows and stuff