Being the one who says “nah, not doing that” when the whole car agrees is a lonely kind of brave. Be that one.

Unanimity in a small space is heavy, and being the only objection means absorbing the whole weight of it alone. That is why it is rare and why it matters. Often the others are also uneasy and waiting for someone to make dissent available.

Say your version plainly and do not soften it into a question. One flat sentence is enough, and you do not owe a justification. Notice how often somebody else quietly agrees once the first person has spoken.