Because people have faith in other people not being complete dullards.

perhaps because the old API is still there? This appears to be a new less secure duplicate, with seemingly no benefit.

Also Apple took a lot of heat from the FBI case, perhaps this was part of the deal for them to drop the suit, which isn't a blatant back door.

The proof will be in their response to the issue.

You could say that it's not as common a problem and could be missed. But what do you say when the push notification is not working well with the new hotness and there is no fix. You need to uninstall, restart, install until the next update of your app is released and then you have to repeat that.

https://forums.developer.apple.com/thread/49512