Chopin was special because he wasn't bounded by the orthodoxy - Chopin was so prodigious as a child and had mostly surpassed his teacher in virtuosity as a mere child. His teacher made the excellent decision that he shouldn't prejudice Chopin with preconceived notions of piano technique so Chopin was free to develop his own way of playing from young through his formative preteen and adolescent years.

Wiki entry on his teacher:

https://en.m.wikipedia.org/wiki/Wojciech_%C5%BBywny#:~:text=....