Have you not been a bit curious to know what would happen or how things would be different if you 'did' the 'don't' instead of the 'do'? Owing to personal bad experience or other's stories or facts, we tend to arrive at the safest or most profitable 'do'.
I have the tendency to think of various possibilities if I had done the 'don't'. Most of the time and most of the possibilities are false, mainly because of my presumptions which are, most of the times, incorrect. I have read this or heard this from some source that infinite parallel universes exist and each universe is created because of each decision we make. Our universe is made of all the 'do' decisions. Other universes might be made of either some 'do' and 'don't' decisions or all the 'don't' decisions. By not doing the 'don't', we reject being in that other parallel universe created by that 'don't' decision. Can too much brooding over the consequences of 'don't' make me jump to that universe and back, as in give me some superpower to jump between universes !!
I once read a book from the series, "Nancy Drew and Hardy Boys, Be a detective mystery stories" in which the reader could either choose to read Nancy Drew's part or Hardy Boys' part of the investigation. Because I didn't want to miss any of the investigations, I kept tabs (my fingers, and later few bookmarks) at each of those pages where I had to decide between Nancy Drew and Hardy Boys. After reaching a dead end or end of the investigation, I backtracked and read the other stories. It was similar to traversing all the nodes of a tree (the data structure in computer science) in preorder fashion.
Its like the game in which a person has to choose between two or more doors. The person decides on one door, and other doors are shown as to what he lost by not choosing the other doors. In life, the other doors are never opened. We make a decision, we enter that one door and can never walk back. Later we're again faced by some number of doors, out of which we select one door and walk in, never to walk back.