Doesn't sound easy at all. Amazon web server sounds, being amazon, also like a risk to store content for long term. But I don't really know the details how it all works.
What I think get, is that ideally (in some hopefully near future) we have small/big servers scattered around the globe storing nostr content, were people see the benefit of nostr and invest in these servers for there own good. For now we get people aware this new way of posting content exists.