It is accurate. My phone shuts down a few minutes (depending on usage) after it reached 1%. It stops charging at 100%. It does fall from 80% to 70% in about the same time it falls from 30% to 20%. I don't see your argument there, except your iPhone isn't calibrated properly and shuts off at 7% or something like that. But wait, you don't even know when it is at 7%, my bad.
It bases the percentage on an estimate of the remaining mAh vs an estimate of the total mAh capacity. Measuring remains charge is not accurate.
You're absolutely right, I am not qualified to diagnose anything. Thing is, people diagnosed it for themselves. There are several replies here in which people claim that they are indeed obsessed with the percentage and look at it all the time or are bothered by every single percentage that drops.
The people saying those things aren't qualified to diagnose themselves either. You have no argument here.
I don't care how you use your phone. If you got this little quirk and feel better with the percentage off, go for it. But please just stop with these far-fetched arguments like "cleaner look", "excess information" and so on...
It is excess information based on how I use my phone. Maybe it's required to you to effectively use your phone. It isn't for me. I prefer a cleaner look.
You're saying that nobody should turn it off. I'm saying that people should be able to choose(and they can). If people don't agree with you, does that mean there is something wrong with them?