Not sure I agree - I think it's just the IFAB acknowledging the way the law should probably have been written in the first place. I think the idea that an accidental handball shouldn't be allowed to create a goal (assuming you even subscribe to that view in the first place) should include the scenario where the ball drops directly to a team mate who then scores.
I have to say I'm not a big fan of the idea but if you're going to implement it, I think including this particular wrinkle to it makes sense and is, as they say, in the spirit of this new law amendment.