I’ve become to have the same viewpoint of holidays as I do with reading books.
It’s not that important if you remember everything part of all the travels you have ever had. In fact, it is unlikely that this would be the case, and photography can help in this regard to jog the memory.
The far more important part of travelling is not what you remember, is what happens to you while you are travelling. After a journey to a far away foreign land, you should come back with new ideas on life, and it should stretch your understanding of what “life” is.
This especially through if you are from a more developed country going to a less developed country, or vice versa.
That is why it is important to travel, because there is the possibility to come back with the potential of being a better person inside of you.