Using the blockage of porn as a argument to not include flash is stupid. Also, even blocking porn is stupid, and it is just a way to get some points with other stupid people.
People do not have to watch porn, but there is no reason to block it off a device.
The porn in SJ's remarks is also the epitome of the overall experience someone goes through when hitting the Android, Nexus, Flash, etc. road. You're very much left nowhere and all by yourself, and taken care by no one, as is case with so many so called 'porn stars'.
As a user of those platforms you fall prey of those who sell you sub-standard, lowest common denominator apps you have no idea what they do really, and who tests them beforehand. They say it's your best expression of total freedom, and their freedom too -- a total freedom of responsibility of what kind of cr*p they serve you. Because they don't care.
So "porn" in this case is both literal meaning (yes, your kids can go and buy porn apps on those platforms) and also a symbolic meaning, for as a user you got scre*ed up in so many ways you start believe that's the best choice and experience you can have.
You start to believe it's your freedom when everyone tries to scr*w you up and deliver nothing but lowest common denominator apps and treatment.
But for others Apple is very much like a decent girl, who does take care about herself and doesn't allow every slimy breath-monster come close. And many people actually fall in love with such a girl, for the first time in their life.
With this Apple also says it leaves others to do as they please, and if people want porn aps, they can buy Android based phones and load them in. Apple also doesn't limit freedom on the web or the way web is experienced -- there's tons of porn on web you can access through browsers. But in their own app store -- nope, they have a right to say what they'd like to have there. And porn is not a part of it.
For every normal person porn is not about broadening the choice, but on the contrary: it's a crude act that's savagely curtailing our freedom to view and experience our human relationships and sexuality beyond mere exploitation and quick gratification, whose only purpose is our money.
There's more to life than that, and exploring other options also means having better choices in life.