Okay, so you not only take issue with PIN+SGX, you think that any encryption scheme (at least from Signal) isn't secure enough. Your point still comes down to "they are storing sensitive information in a form that is ostensibly encrypted but still subject to attack (in the opinion of XYZ reputable people...)".

My point is only that the headline of your point was "they are lying about not storing sensitive information". That leaves out a very important part of your point. IMO it makes the claim seem sensationalized and starts you off on the wrong foot.