“Why should people have a right to know when I have or haven’t read something” — that sentence makes no logical sense whatsoever. A possibility isn’t a right. Signaling the reception of a message is basic communication courtesy. Imagine trying to talk to someone in a situation where you talk but your interlocutor makes no indication that they heard you. If there’s no acknowledgement then there is no indication that communication took place.
If I had arranged a meeting on whatsapp and asked for confirmation while the other person has read confirmation disabled and doesn’t acknowledge in another way, I wouldn’t show up, period.