This works to a point. Some decisions are large enough to be made jointly (relocation, very large purchases, etc) but otherwise correct. My wife of 16 years and I do something similar to this and it works well for us.
Talk to each other? My last relationship was also similar where I always try to make logical decisions while my gf often made emotional decisions due to temper. We always talked these things through and she always loved that I could explain my point of view logically while understanding and respecting why she made a decision. In the end, we tended to go with my decisions but she was happy doing so almost always because she was convinced or she had calmed down by the end of the discussion.
besides telling her your pov, maybe try to listen and come to a win win solution? If you do insist on your solution being better, you should at least make her feel listened and tell her that you are making this decision for the greater team, not just for yourself