Yes, because even with federation it is inherently advantageous for a user of a social platform to be among the largest pool of people they can identify, to make random stumbling into discussions and groups as likely as possible.
It’s a weird thing where we want the federation to provide a network of smallest scale platforms, yet we do this for social media, where the experience is naturally best when it starts with a single giant platform you filter down not an ocean of individual bits you have to glue together.