You really can't get it through your thick skull that a monitor is inherently inferior to the human eye, can you? I am not saying spotting aircraft is easy, I am saying that it is a hell of a lot easier than in the game. (the first time I was in the air btw I was gobsmacked by the clarity with which I could see everything as opposed to flight sims)
And yes, it was for spotting ground targets, but you want zoom to get disabled completely, which would disable it for those who would use it in the same way IRL pilots used it in real life circumstances.
Since you like things to be so realistic.