Only keep data or metadata of important stuff is a better strategy I think. Why would one need to keep a copy of a film like the Lord of the Rings movie when i

Only keep data or metadata of important stuff is a better strategy I think. Why would one need to keep a copy of a film like the Lord of the Rings movie when it is so easy to download? Why would one need to keep metadata of having watched LoTR? Forgetting is a feature since it allows our minds to disregard insignificant stuff.