I don't understand why Google, who is apparently competing with Roku with Chromecast, would try to "help" Roku fix a worse user experience? My Spidey sense tel

I don't understand why Google, who is apparently competing with Roku with Chromecast, would try to "help" Roku fix a worse user experience? My Spidey sense tells me there's more to it than just trying to fix the Roku UX.