You're missing the point. Apple already stated where the weak spot of their phone is, and they also said you can touch or grip it and affect signal.
What they are doing is highlighting the point that ALL phones have weak spots, they admitted that theirs is probably the easiest to exploit because of the design, either by detuning by bridging the gap or by blocking it with a grip.
It is correct that all phones have weakspots, and it is correct that Apple's is probably the easiest to exploit, but what they are doing is an effective way to at least show people that the iPhone is not the only phone that can lose signal due to our hands.
I think it's a great idea to shut people up already actually. Not because I'm an Apple apologist, but because the whole issue was a mountain made out of a mole hill and it's really time to move on. Either buy the phone knowing what you know, don't buy it, or take it back. Seriously, it's time to move on. Apple is doing damage control, and no one should have expected any different.