!
Look at it this way. If there is a problem down the line waiting to ambush you, is there anything you can do about it? If there is not, what are your contingency plans? Once you know what you are going to do if the worst happens then there is nothing you can add to the situation and it will happen if it is going to happen. You can't influence that so there is no point in worrying and wondering.
Once you have done all you can do in any situation (including contingency planning for your known knowns and your known unknowns) then there is nothing else you can add so no point in overthinking past that point.
Thanks for that - such a philosophy would be very helpful, particularly in the world of broadband, cyberspace, where so much remains outside the individual’s control.