You see it. Not hear it. And you only see it if you happen to be staring at your phone.
So yes, this is the whole problem. The fact that Apple finally added audible notifications, but only for texts, is just infantile pettiness on their part. Truly incredible, since the settings screens are otherwise nearly identical.
I think, given the difficulty you're having getting people to understand what exactly is the feature that you're missing, undercuts the idea that it's an essential feature which is inexcusable to not support.
Not really. Try doing a search on the issue. It has been complained about for the iPhone's entire existence. The "not understanding" here reflects the sad acceptance of ever-falling design standards. People forget how much something sucks when they habitually incorporate workarounds to its failings day after day, year after year.
Missed-call notifications were a standard feature on cell phones way before the iPhone (the StarTAC, for example). Not to mention answering machines. Even microwave ovens beep periodically if you forget to take the food out.
But if you miss a call on Apple's $1000 handheld Unix computer/phone, it doesn't make a peep. You don't even have the OPTION to make it do so. That's simply dumb.
Yeah, after reading the link you posted above, I get what you're talking about. Fully agree. I should be able to select any arbitrary notification and enable repeated alerts for it. Not just calls or texts or whatever, but anything that's important to me not to miss.
What's really baffling is that iOS hides older notifications after some amount of time, or screen unlockings, or something. I like to leave notifications around so I can remember to handle them later when I unlock my phone ("oh yeah, I need to read/respond to that email"). Instead iOS just removes them from my lock screen so I don't see them when unlocking and I forget they exist. They're still there--you can swipe up from the bottom to bring back your hidden notifications--but that requires you to remember they're there, which is the whole reason I didn't dismiss them in the first place.
iOS's notification system is shockingly bad. Android is leagues ahead here, both in features & configurability.
So yes, this is the whole problem. The fact that Apple finally added audible notifications, but only for texts, is just infantile pettiness on their part. Truly incredible, since the settings screens are otherwise nearly identical.