If the Catholic Church had taken a wrong turn, Luther would have been correct to point that out.
However, he didn’t just point the driver back to the highway it was supposed to be on. Luther got off the bus, or was thrown off after creating a commotion, and then built his own ox-cart based on new ideas (sola scriptura, sola fide, etc.) and continued on his merry way picking up passengers as he went.
The bus driver may have taken Luther’s directions back to the main highway into account, but it was the DRIVER who made the corrections you refer to…not Luther. Luther wasn’t steering the bus.
Finally, I’m not denying that the folks in the wagon will get to the ultimate destination that God intends, but I do deny that God ever intended for the crowd to rely on anyone other than the man that He licensed to drive the bus.