You keep stating the same thing over and over and over all while thinking it is an explanation. You are also ignoring every logical point I've made.
1. I've shown you it is NOT an advantage by explaining a person who boosts a character likely will play that toon worse than a person that levels and will also likely have worse gear and less gold.
2. There's no competition in leveling. So getting to "endgame' first is not an advantage. Its not even an achievement. Its literally nothing but a benchmark you fucking made up. For fuck's sake, buying the game before you, gives me the same advantage you're claiming a boost gives. Did the act of simply purchasing the game make it a pay to win? Of course not.
3. I've explained that wow has gone percentage based, so different levels don't actually have a noticeable difference until you get gear, which you have to earn in endgame content no matter if you boosted or not.
4. If paying for a boost is an advantage, then so is paying for a mount.....for the exact same reasons.
5. I've given you examples of things that would count as an advantage and leveling faster isn't one of them.
6. The only thing WoW does that comes close to pay for win, is game time tokens, since they can be sold for gold. that's it, but gold has been mostly trivialized at this point.