What do you base that conclusion on? Have you done a poll? I’m genuinely curious what percentage of your users find the editor to be a fundamental barrier.
For my part I’m fairly highly confident that most people don’t move to - or at least stick with - forums because they have to make continual effort to go there. Facebook (and other social media platforms) are massive aggregators of content and users to interact with. They are very “sticky” platforms by design. And if you have multiple interests, you don’t have to go multiple “places” to satisfy that. It is really really hard to beat that. I’d be shocked if that factor isn’t the single biggest barrier for most people.
I wonder if my idea of a topic+chat hybrid might blend advantages of (or user base preferences of) the two…