If Sunset Overdrive, ReCore, Banjo N&B, Viva Piñata, or Quantum Break indicate that it's not that easy. Even Halo Wars 2 performed badly despite having the Halo IP attached.
It's never easy.
But you have to continue to put forth the effort. If one of those games were as good as, say, Zelda BotW or Last of Us, do you think people would ignore them?
The thing about having a diverse portfolio isn't that you are guarunteed to have everyone be a top seller. It's that you'll have a console with software that appeals to a wide range of gamers, increasing the likelihood that any individual gamer will be attracted to the platform.