Yep, you called it! Do you honestly believe that your bore gets any more contaminated using a snake than it does when you...oh I dunno, shoot it!? If your OCD gets flaring with a dirty snake, how do you keep your hands from trembling at the thought of shooting!?
Bore snakes/pull through's have been used for at least 100 years, and yes the old hemp twine pull through's could score the crown but only with excessive and careless cleaning techniques. Pull it straight or relatively straight and trust me you're fine. You'll do more damage to the barrel squeezing a round through than you could ever do with 1000 pulls of the snake.
For me it's a time saver. On the rare occasion that I put a gun to retirement for a while, I will run my regiment of long term storage which includes patches and ultimately spray grease. Not a speck of rust yet.
I really think the debate is much ado about nothing. BTW, rods can damage chambers worse than any bore snake could hope to if care isn't taken, crown too.
Did I break through the wagon encirclement?