100% that's it. With a pull model you just need to make your own content available for anyone who requests it. With a push model you have to have some record of

100% that's it. With a pull model you just need to make your own content available for anyone who requests it. With a push model you have to have some record of who subscribed to it and how to get them your new content. Combine that with ActivityPub being federated rather than peer-to-peer and you end up with a lot of legal gray area to go along with the added complexity and loss of anonymity.