You got a response in the same tone and attitude as your "not a feature, but a problem, an error" comment.
Is this some kind of cultural misunderstanding and that kind of attitude is considered normal?
Understand something: I am not your employee, nor you are a customer, so don't speak to me or about me as if I was your employee or owe you a service or even kindness.
Weird point to make. Plenty of things are "a phone function", and they don't have an icon. Light sensor, proximity sensor, accelerometer, gyroscope, microphone (e.g. Voice Match). My point is - NFC is not a battery drainer and doesn't warrant a whole dedicated icon for its on status, unlike mobile signal, Wi-Fi and Bluetooth.
The NFC icon is not even a universal standard across different brands.
For you it isn't, but we can't make everybody happy...