So no, preference isn’t a choice and can’t be changed either.
You are so very wrong on so many things here
Ender Wiggin

It IS a choice. A preference is a liking of one thing over another. If given the choice between A or B, your preference or choice would be A over B. Your example of lasagna over broccoli is ridiculous because people’s tastes DO change throughout their lifetime. I prefer dark haired men over blondes or redheads, but I have chosen to be in a relationship with a redhead because of other factors that mitigated my preference.