Thats why you need cards that can do something with all of these land cards, because its very likely that youll not only be making use of them in your deck, but also flooding the board with them as well
If an exerted creature is already untapped during your next untap step (most likely because it had vigilance or an effect untapped it), exert's effect preventing it from untapping expires without having done anything
Importantly, that colorless part is painless
Especially if you can ramp to these on turn 3, theyll provide an incredible defense until they grow to game-winning size (also try giving them evasion with cards like Temperamental Oozewagg or Meteoric Mace)
You'll usually get at least a turn or two of free card draws before people start trying to get rid of it, but that's all you need to get way ahead
You don't have to wear gloves when opening packages of Pokmon cards