you need to seek consensus, in order to reach it, so i disagree. of course, if you can't find consensus after sufficient negotiation then that is a problem, but it depends on the nature of the relationship and the nature of the point in question, how much of a problem it is.

failure to reach consensus could threaten your relationship.

if my boss keeps making decisions for me then i'll eventually quit my job, because i am not willing to work like that. and if my partner does it then it will lead to a breakup and if it is something else, a judge might force a consensus on us.