3 lines now offer the current best land/hand gear which is also locked behind specialist recipes. The chances of getting 3 lines are so low that it is very seldomly ever achieved by people, even after repeated shuffling until chances are optimal. Factor in the fact that RNG favors failure a bit more than success, especially at crucial times, and it's really just a slap in the face.
If we could apply 10 stickers a week though instead of 9 our chances would improve considerably, but not too considerably so as to retain the value of the prizes. After all, at this point it's either this or remove 3 line prizes entirely so as to stop waving it in our faces and taunt us with a "nyah nyah you can't have me!".