The disagreement is how to factorise expected utility function into probability and utility, not which bets to make. This disagreement is still tangible, because the way you define your functions have meaningfull consequences for your mathematical reasoning.
Betting argument are tangential here.
https://www.lesswrong.com/posts/cvCQgFFmELuyord7a/beauty-and-the-bets
The disagreement is how to factorise expected utility function into probability and utility, not which bets to make. This disagreement is still tangible, because the way you define your functions have meaningfull consequences for your mathematical reasoning.