Our modern piano has a very rich history. Classical pianists regularly play music that was written for an instrument other than the modern piano they play it on. In recent decades there has been a movement to playing music on what are called “period” instruments. This means that performers play classical music on instruments that were more like the instruments that the composers actually wrote the music for.
Understanding that our modern instruments are different than the instruments composers wrote music for can help the performer understand the music they are playing better and improve their performances.