Whether it be enchantments that temporarily exile permanents or Auras that remove abilities from creatures, white has an entirely separate suite of cards that can deal with threats
Naturally, it's great at reanimation but also at putting cards in the cemetery
If you want to play Dredge because you think its the best deck in the format, I have bad news for you
Chance Encounter shines with Yusri, Fortunes Flame, or the duo of Okaun, Eye of Chaos, and Zndrsplt, Eye of Wisdom, where you can realistically flip ten coins in a single turn
I also like this in self-mill brewers where you can cast it once after milling it, it's a creature for self-mill triggers like Sultai (where this would be a 5-mana return ability) and Golgari that has mill from your library trigger leaders in the Command Zone that would love a self-recursive threat