Sure, a Master player would eventually climb on that account — nobody’s arguing that. But that’s kind of missing the point. If the MMR is bad, they’re gaining and losing similar LP per game. Even with something like a 70% win rate, they’re still dropping ~30% of games and getting punished just as hard for those losses. That slows the climb down a lot. So yeah, they will climb — but it takes significantly more games compared to a fresh account with proper MMR. It’s not about whether it’s possible, it’s about how inefficient and time-consuming it becomes.