I guess I could, but always something new since we don't go that often and the kids are different ages so always different things to do
And I don't plan out every second of every day or anything - but I like my spreadsheets and it helps set aside what part we will do what day based on projected crowd levels and then plan the places we want to eat around that and get the ADRs set and then get the FPs set around that so we aren't criss-crossing the parks and allow for some down time, etc.
I just hate more than anything doing the whole "what do you want to do? I don't know, what do you want to d?" thing - I like having some sort of plan
Actually our last vacation we spent a few days with members of my wife's extended family and she was in charge of those days and the plan was basically no plan and just relax .... and I foudn those to be the most stressful days of our trip!
so no, no I can't "just wing it"