Could it be that time travel is so difficult because it would be wrong to travel into the past and meet our parents
as children and wrong for us to travel into the future and
meet our children as O.A.P.`s. Supposing we travelled into
the future and discovered the date of our own demise, would
not that be something we would be better off not knowing?

and what about if we found out how we died and a world changing event was not concieved because of something that was said at the funeral?
the only way we could do it is to watch. say little and enjoy the moment. i would be a tramp for the day. no one sees or speeks to them and so there would be hardly any impact. see my post. of course time travel is possible.