That's why I said from the start that I am talking from a longevity point of view, data is timeless, it is currently the only possession you can have that CAN exist even in thousands of years. A file storage (and copies of it) is worth WAY more than anything else you can possess, simple fact that almost all we can buy will simple cease to exist in the near future, it doesn't have the potential to be around millions of years, data has that potential.
Almost all empires of the past, all buildings are gone, as long as we have computers, data will be kept, it is simply the currently best way to preserve your legacy.
Also, by your logic, a house COULD also be destroyed by natural disaster, how is that different to servers shutting down, they are both out of your control.
Or all your possession inside your house could be robbed, or they could burn to a crisp, you see nothing in life is consistent or persistent, it all has factors that can remove them without anything you could do. I think the most likely possession that can be saved at all times is, in fact, data.