“If you have more than one reason to do something, just don’t do it. It does not mean that one reason is better than two, just that by invoking more than one reason you are trying to convince yourself to do something. Obvious decisions require no more than a reason.” (Nassim Nicholas Taleb)
Back to business: Pro / contra lists seem to be reasonable for thoughtful decision making. However, more reasons simply don’t improve the underlying of the decision that is to be made. If you just “know” why you want to do it, do it.