This is really a branding failure. Facebook's brand conflicts with Oculus' brand. I'm surprised they didn't see that coming. Reality is complex, but perception is usually stunted. Facebook = evil corporation who only cares about selling personal data. Oculus = good guy, cares about us, cares about VR. This is a load of bullshit, but that's the branding perception. Try to change that, and you get chaos.
But whatever their goal was, it is now in the hands of Facebook. Sure they now have resources, but they also have a new master who has his own agenda which may be in line with Oculus' goals now but what about tomorrow? If Facebook hits hard times do you think Facebook will continue to have a hands-off approach with Oculus?
Also to address this specific point:
> Facebook is in every home. Being bought by them obviously helps Oculus to be in every home.
Facebook software is in every home. The Oculus Rift is not software, Facebook lacks the manufacturing/distribution/RMA/support infrastructure for consumer hardware products so that has to be built up anyways - all Facebook brings to the table (that I can see) is money and HR capacity. In many ways this makes less sense than an IBM/Microsoft merger back in the day because IBM was already selling computers with operating system and Microsoft could have naturally piggy-backed on that.