Because you have to have a supply of lactase pills always readily available on you.
I often forget my pills and thus rely on lactose free products, e.g. Lactose free cappuccino... which by the way is much easier to get in Germany than in the states (for whatever reason)
I had the same issue, but I got a metal pill keychain holder from Ebay for $2 that helped a lot.
I also think this is quite different since it's an order process, where the candy naturally stays at home except when you bring it somewhere, and then it's not too hard to remember to also bring some enzymes, versus randomly discovering an appealing lactose product when you're out.