This is very different from past "platforms" such as niche phpBB boards on the old internet, book publishers or even editorial sections in newspapers who at least to some extent are driven by a genuine interest in the content itself even though they are, or were, also financed by advertisements.
The main problem here is that we allow commercial companies to provide generic and universal "free" content platforms which end up being the de facto gatekeepers if you have something to say. These platforms can only exist because the companies are allowed to intersperse generic user-generated content with advertisements. In my opinion, it is this advertisement-financed platform model that is the core problem here, and automated censorship is only one of the many negative consequences. Other problems are that it leads to winner-takes-it-all monopolies and that it strongly incentivizes ad companies such as Google to collect as much information about people as possible.