True, but S3 offers you extremely high availability and security for a quite fair price, and not everyone wants to immediately self host on their own hardware.
What do you do if your hardware is housed at home with crappy residential upload speeds?
It’s a genuine question because I’ve settled for hosting on Storj, but because my friends and family can’t be bothered to connect via its client I’m running a WebDAV rclone proxy on a VPS over Tailscale. So not only am I paying for the storage itself, I’m also paying for transferring the data and on top of all that, it defeats the point of Storj being P2P from and end-user perspective.