I think the problem is that FB or Apple don't really get directly hurt from these exploits being used. Some politician gets hacked and important personal data g

I think the problem is that FB or Apple don't really get directly hurt from these exploits being used. Some politician gets hacked and important personal data gets leaked - oh well, there was a bug, we've patched it, one less user out of a few billion. And the vast majority of people probably don't rank this kind of thing very high on their threat model, they're either not going to know or aren't going to care.