No, it does not "publish your content to nostr in a native way". It simply uploads to a separate HTTP server and inserts a normal HTTP link in your nostr event. Unless I missed something, in which case I'd love to learn what!
I understand what you're saying. It does however not drive nostr's content to centralised sites. With nostr there is no need to send me to your X to give me a link to your twitch to then send me to YT to watch a video only for the description to send me to Medium for your latest blog before the link in the blog is sending me to your Instagram. Point is that there is creators on nostr who're only here to drive content to other platforms, the platforms where they earn their fiat bucks.