Gamers, particularly PC gamers, are a minority of computing end users. Minorities get less attention than the mainstream. Oculus VR chose gamers, particularly PC gamers, as its beachhead. The dedicated attention from such a world-changing technology must have been special. The backlash against losing that special status is understandable.
But VR's potential isn't limited to gamers. That is what Facebook recognised and is capitalising on with this acquisition. Oculus, as a (perhaps the) leader in the consumer VR space, is well positioned to shape the future of VR and with it consumer computing. They had a choice between a niche and the market, and they are reaching for the moon.
The expanded mandate means gamers will become a minority of Oculus's customer base. It does not follow that their experience nor expectations should degrade. Preëmptively burning Facebook and Oculus for thinking big seems petty.
I am open-minded about Oculus's future at Facebook. It is possible that Facebook will mis-manage Oculus and squander its lead. It's also possible that an independent Oculus would have missed the forest for the trees. That by going 100% for gaming, it would have forsaken a greater destiny. Barring back-seat driving by Facebook management, Oculus has more options at Facebook. More options are good for a young company at the beginning of a open-ended road.