Fishing for a better seed isn't cheating, but it is counter-intuitive to the spirit of the game.

The struggle is what gives success meaning. It's what creates stories. Think about any memories you make from this game, what would you hold onto as more dear? "Oh, I found a swamp crypt 2ft from spawn, ez iron" or "My epic quest for Iron lead me across 4 continents, I had to kill 10 serpents and destroyed my boat on a small island, facing a scramble against nightfall to retrieve the materials, harried constantly by the wayward rocks of Greydwarfs. On the fifth day I shared a rest with a two star cave troll, I'll make this for later as right now I am ill equipped to deal with this challenge. Finally, after many days at sea, my persistence and tenacity paid off, a swamp with over a dozen crypts."

Like, maybe I'm just speaking from my own perspective, but I don't remember the 50 other times I've killed Yagluth or the Queen, but I do remember the first, when I had no idea what I was doing, being brought down to single-digit HP and using every resource I had to persevere.