To combat this, many of them have some sort of downside Animate Dead gave the monster -1/0, Exhume allowed both players to reanimate a target in their graveyards, Stitch Together required payment of life but the downside was never really enough to deal with pulling things like Griselbrand, Elesh Norn, Grand Cenobite, Sun Titan, and the like out of a graveyard for free
The idea, at the time, was that we could create some extra layered complexity by having cards that could take advantage of the fact that most creatures have two creature types on them
Theres plenty of history to celebrate within the game
Very few rares stay over $10 unless they are cross-format stars or staples, so whatever this hype is, you want to be feeding it, not holding and hoping
We're slowly but surely seeing a shift in precons adding more and more untapped duals: we've got filter lands like Cascade Bluffs, some reveal lands like Choked Estuary which while not amazing are still better than any tapped dual, and battlelands like Sunken Hollow