I don't really know why that's become this like, hard and fast baseline in terms of what it's going to take to acquire any good starting pitcher. The trade didn't happen. It was a negotiation. There's some middle ground between 'there was a rumor from writers that one team was demanding 2 top 75 prospects in a trade that didn't happen' and 'the best prospect traded for not-Mason Miller was a single A pitcher who some thought, maybe, would sneak onto top 100 lists at the end of the year'.
Also what Plaid said above, which makes that very much an apples and oranges comparison.