Doesn’t the scary part apply to iOS 14, 13, 12, …, 3, 2, 1, too?
They may have been secretly doing this all the time. I don’t see them being open about this changing that.
In the end, it’s all about whether you trust them. If you don’t, either don’t buy an iPhone, or wait until people you do trust have reverse engineered its software so far that you can trust the OS.