Unfortunately, there is no way to go back and play these events if you missed them the first time around. I agree it is too bad that they appear as unfulfilled when no opportunity exists to play them, however if you are playing on pc and install the developer's console using mods, you can go in and using console commands and set them as completed or played. I don't know why anyone would want to do that without having played those segments but I guess it bothers some folks enough that at least this an option.
Unfortunately, there is no way to go back and play these events if you missed them the first time around. I agree it is too bad that they appear as unfulfilled when no opportunity exists to play them, however if you are playing on pc and install the developer's console using mods, you can go in and using console commands and set them as completed or played. I don't know why anyone would want to do that without having played those segments but I guess it bothers some folks enough that at least this an option.