to be automatically imported, relays would need to know all the feeds. Nothing prevents a user from claiming someone else's feed. But the same is true with podcast: anyone could mirror a feed and swap out the wallet addresses. This is a shared responability between publisher and audience: audience needs to verify, publisher needs to provide means of verification. In that particular context, i believe nostr has a greater chance, because cryptographic verification mechamisms are built in the protocol. But we'll only ever know what really works once we blow up and we start having big stars pulling in big figures.

there are two slightly more mature clients i recommend you try:

nodecast.xyz

nostria.app

don't raw dog your nsec though. Like ever. Extension, amber, or throwaway keys! 😅💜