It's also not an equivalent product. It's not like you get to choose if milk has lactose, the dairy-free option has completely different components and sources.
Except you can. The lactose-free milk has lactase added, which is the enzyme needed to break down lactose. Otherwise it's more or less the same product.
it is, it is similar to an alergy and 2) legaly it is considered a disability under the ADA if someone or a group of people would consider it as one... have you been to wisconsin