The suffragists arguably achieved a great deal more, without them the measures of the suffragettes would likely have set women’s rights back further.
I don't agree that the suffragists are forgotten. Beyond that though, I'd say that lots of successful liberation movements have had multiple wings with different methods.
I think the point is that they weren't "forgotten" but deliberately repackaged. And this action is going on today. Scroll down to the dead posts. There's one that gives a very factual account of how some suffragettes joined up with the Fascist movement in the 1930s. They were probably rooting for Hitler. Yet, someone quickly down voted that factoid out of the main stream.