I'm not judging harshly: adrenaline dumps are a real thing. And even though it looks under control, a few passenger interviews have indicated that many folks didn't have time to think.
But the whole point of all those procedures about turning stuff off and putting things is away is situations like this: you may or may not have time to think, and you may or may not have to deal with smoke or flames. And just because there weren't smoke/flames right at that moment, you can't tell if they would arrive "soon": planes have been completely engulfed in fire with-in 90 seconds in the past.
The idea behind suggesting a fanny pack, and perhaps having all your cards and papers (and medicine) on your person, is so that if such a thing should happen you do not have to think to make sure you have what you need. So that in a panic you already have it with you if you get out just by the fact you got out and it was physically attached to you.