Advertising is a racket, like the movies and the brokerage business. You cannot be honest without admitting that its constructive contribution to humanity is exactly minus zero.
If God creates a world of particles and waves, dancing in obedience to mathematical and physical laws, who are we to say that he cannot make use of those laws to cover the surface of a small planet with living creatures?
Trying to manage diabetes is hard because if you don't, there are consequences you'll have to deal with later in life.