They keep your landfall triggers consistent which is the most common way to stumble when piloting a lands deck
Jason and I have bucked this trend by building Cubes where aggro can beat a Wrath, increasing the playability of spot removal (as well as its density), adding back in some sweeper effects, and creating a complex web of checks and balances that is more like the healthier Standard formats of a year or two ago, if not Modern or Legacy
Seedtime is a simple card that requires particular circumstances to be used
Lavinias not as powerful at lower-powered tables where you wont encounter these strategies
This one-drop demands that you have two removal spells right away, because your opponent is almost certainly going to toss a land into the bin if it means keeping Safekeeper in play to keep their combos safe
Halo Fountain excels in aggressive or Convoke decks, allowing you to untap your creatures while also drawing you a card