Oy. KT, I've seen as much as you have, I suspect, by this point. You're looking from the perspective of who deserves to sit there. I'm telling you that if your airline says I don't deserve to sit there, I will fly with someone else. It's not an empty threat, either; I've already done exactly that this year.
In other words, I value this feature above nearly all others. I am willing to pay more to sit there (though not twice as much and certainly not ten times as much).
Incidentally, on my more frequent routes, FAs remember me, specifically because of my exemplary behavior and recognition that they are people, not servants. I've had some wonderful experiences as a result.
As a related side note, on my recent PIT-PHL flight, I was sitting near 2L and was waiting for the door to open when we got to the gate. While I was waiting, I turned to the FA who was standing there and asked if she was a PI FA before the merger. She got the biggest smile on her face, and told me that she was, and that it truly warmed her heart that I noticed. She may be losing her job soon (and I just hate that for her. Really. She was a joy to behold), but I'd like to think my small comment made the rest of her day more pleasant. It's not that hard to make a difference.