As you get older, respecting your parents and agreeing with them stop being the same thing.

For most of childhood the two are genuinely fused, because agreeing is how you show respect before you have a view of your own. Then you develop one, and the fusion starts causing trouble: disagreeing now feels like an insult, so you either swallow it or you fight about it. Separating the two is what makes an adult relationship with a parent possible at all.

Try one disagreement held calmly and without a campaign: I see it differently, and I am still doing it my way. Respect lives in the tone and in staying in the room, not in the conclusion.