I'm not sure this is a good metaphor since weapons are designed for violence, regardless of whether that violence is legally justified or not. Just to be clear, I'm not trying to make a political stand, this is simply the dictionary definition: "weapon /ˈwɛp(ə)n/ a thing designed or used for inflicting bodily harm or physical damage".
I'm not trying to do politics either, so I don't know how to respond without straying too far off topic. I will cede that I probably could have picked a less polarizing example. Just first to come to mind.
The example was meant to highlight that not everyone uses a product/device the same way as others. If one's use of an item does not bring harm, infringe upon, etc of anyone else, then why should they not be allowed to use it? Obviously, once you use an item to infringe upon, bring harm, etc, you should be the one punished NOT the others by trying to banish the item.
Honestly that's not a great example given that you can't understand ZFC until you already know enough set theory to understand the motivations for ZFC.
I think Microsoft has already demonstrated that launching a successful new mobile platform is extremely difficult (if not impossible) at this point regardless of resources and hardware capabilities.
Microsoft had no leverage and developers weren't onboard because they had no incentives to do so.
Facebook has leverage - if their future on iOS (and maybe even Android at some point) is at risk, they could very well release a Facebook phone and offer incentives to their users to move.
Developers would also be onboard if Facebook offers incentives to them. Despite all the bad reputation Facebook gets on the surface, most tech companies happily use and depend on Facebook for their marketing & advertising efforts, so they'd be more likely to embrace the Facebook ecosystem if iOS is interfering with their marketing ability.
Add one or two interesting hardware twists, be compatible 100% with Android and aggressively get apps on the platform (pay developers to upload). Oh and be the hero by charging very little for the appstore (5% maybe).