@dhabiheng
"You could not live with your own failure. Where dis that bring you? Back to me" - Gabe Newell, probably
Seriously, though, this might've been the reason for this move.
Microsoft's documents also says that Activision making Call of Duty on PC a Battle net exclusive from 2018-2021 was a "resounding failure" and did not result in any meaningful increase of active Bnet users.