I suppose it's like someone saying "duck" instead of "fuck"; or those old curse filters in online games that blocked words like "analysis" so it became @nalysis instead.
What you're seeing is a mix of "professionalisation" and "protect the children" - essentially "you are in a place of work that has children" when you're on a platform. This is, of course, completely fucking nuts and defies logical analysis.
Folks find a way round, so you end up with work around terms, and the like. What we really need is a "kidsnet" - a heavily filtered version of the net for kids that limits communication options and auto filters content.