In then, that would mean, perspective is not wrong. It is that potatoe/potahtoe rigamarol and fruitless to argue either point to the point of warring among one another, which, is what this topic breeds.
Coin toning is damage. If you like it collect it, if you don't like it don't collect it. Collect your own collection.
If you are seriously interested in an answer to your question about how attractive natural toning affects the value of a coin, please feel free to read the thread linked below. Be warned that it is over 300 pages long, and that the original Toning Premium thread is over 100 pages long. The Toning Premium Thread Part 2
If the coin tones (tarnished), some say it is damaged. So then, if you dip it to remove the tarnish, is it undamaged. Seems like a Catch-22 to me.
Seems like you already know but coin dips are commonly based on acidic thiourea which will remove toning with just a dip, no rubbing required.
If you'd like to see some nice toned coins, just polish a few silver coins today and sit them in a drawer for five or ten years. Another way to get nice rainbow toning would be to sit your coins outside, maybe on the roof or somewhere they won't be found, for a year or two. The weather will give them some very pretty colors. That is why I avoid toned coins.