Just look at Sega, Persona and Yakuza are thriving as fully multiplatform releases, both are bigger than ever, or Capcom making a killing as a (mostly) fully multiplatform publisher, albeit Capcom still has moments where some things skip Xbox but their biggest are all on Xbox. 1-2m extra sales for FF16 is nothing to be scoffed at especially in todays climate.
And all their random side projects need as many players as they can get, especially since a lot of them end up being mid, Lol.