Magic doesn't need bad cards to sell packs, it only needs a sea of mediocre cards and a few very good cards to make the few good cards look good and get people to chase after them,
If people only chase after "a few very good cards", then mediocre cards are bad cards, at least from the point of view of the OP, which is a complaint about how some cards are used a lot and others aren't.
Edited by Quarrel