Will an agreement in writing really get partners to do it the way you want? I feel like that's some other issue who's solution I don't know but just writing it

Will an agreement in writing really get partners to do it the way you want? I feel like that's some other issue who's solution I don't know but just writing it down won't actually make the difference when it comes to actual behavior. I've been in a similar situation where co-founders had different goals. I used to think talking before hand and getting things in writing would have helped. I'm pretty confident now that writing would not have helped. Talking might have except that people hear what they want to hear so they all think they agreed but they all think they agreed to something different