I can understand your point. I sort of second guess myself and worry more about the plans because it isn't just me that I'm planning for. I travel with a friend and she doesn't really give me any input. I feel like I'm responsible for her having a good time and I worry. The first time we went, I really catered the vacation and made it all about her, because it was pretty much her first trip. She had been only to MK when it first opened. Last year, I made it a little more of a compromise between what we both wanted. It would be way less stressful if I only had to worry about planning for only me. She doesn't realize how much work goes into this. I wish I could just go along for the ride with everything planned for me! Lol.
It's funny, I was discussing this with a friend recently. She and her partner often travel with another couple. She and her partner are major planners, and they experience exactly this frustration -- can't get the friends to offer opinions, friends don't seem to want to give input, stressful for them because they want everyone to have a good time. She said last year for the first time they just planned based on what they knew about their friends' tastes, didn't sweat the lack of input, and did what they wanted. And she said what she realized when they went on that trip was that their friends had a blast -- for their co-travelers, part of the experience of the trip was to be surprised, to not know every detail beforehand, and to enjoy whatever it was they were doing rather than having a list of things to check off.
It really struck a chord with me because even though I am a planner, when we go to Disney or even anywhere we are really this is what I care about too. I make a plan so that we won't just stand around looking stupid, but what we care about in the end is how much fun we had, not what we got done in comparison to what we didn't get done. So maybe it's really the case that your friend is like this too, and if you can relax about having to carry the planning load it will turn out that she is happy with almost any choices you make. It certainly might be worth asking about.

If I were to be completely honest, I can see how I might turn out to be lousy at it too!