Before rushing to the idea that travel companions absolutely determine the destination, we need to ask what protects the trip if group preferences lead to a deadlock.
The exit condition is crucial: what happens if no one agrees?
If the group's influence is the only driving force, the risk is to cancel the trip or choose a destination that satisfies no one.
In Germany, we always prefer to have a Plan B rather than rely solely on one option.
For example, if I want to visit Christmas markets and my friends only swear by the beach, I won't cancel my trip for fear of traveling alone or finding others.