I have changed my peanut butter choice - when science started realizing trans fat was a problem I switched before the law changed to reflect science. I have also tried various of the 30 different options in other situations and found the one I personally like best. The value isn't just that I can make a choice, it is also that other people really do make different choices.

You are forgetting about the time factor. I don't make a choice every time, but I'm not a 22 year old out on his own for the first time either (22 was about 30 years ago for me, and there are reasonable odds I have another 30 years to go). I don't have to make a choice every time to take advantages of choices.