They'll win against anime, but anime is only a fraction of its own industry. Its the most front facing part of the manga/lightnovel/doujin treadmill, but its also the most commitment heavy and costly. They can subvert it, but they'll never be able to stop all those other forms because the barrier for entry is so low.

So it doesn't matter if they win. Most of the same stories will get told, you'll just need to read it instead of watch it. And the sheer mass scale of scanlaters mean they can't even control the flow of those to Western countries.