But one of the loudest issues related to Microsoft acquiring Blizzard/Activision is that Call of Duty will be part of the deal and that Microsoft will keep the

But one of the loudest issues related to Microsoft acquiring Blizzard/Activision is that Call of Duty will be part of the deal and that Microsoft will keep the game on it's platform. My question is, how is this considered a deal-breaker if this is something that Nintendo already does and has been doing in the industry for decades?