A slab of beef isn't the same as a "burger patty*" where the meat is coming from 54 different pigs, including cartilages, tendons, skin &co and contains 12 additives coming from the petrochemical industry.
The same applies to vegetarians/vegan stuff, you can make a patty from beans at home with like 3 ingredients, or buy ready made patties containing hydrogenated trans fats, bad additives, food coloring, &c.