They dont necessarily have to attack, but Kuss and/or Vine can definitely shred a peloton on that particular climb like McNulty and Kuss did at a couple of occasions in 2022 TdF to the point of only being 3-5 riders left. Thats completely fine as well obviously, Im not gonna sit here and expect a suicide attack.Almeida nor Thomas have ever done anything as imaginative as attacking Giau. Roglic has been part of a thing like that but any scenario where Giau attack works involves him having the legs to win on Tre Cime anyway.
Just look at how unimaginative Jumbo, Ineos and UAE have been this entire Giro. Roglic still has 7 helpers with him, but they still can't come up with better ideas than "let Kuss drill it for 10 minutes"