By cancelling they could be cancelling all subsequent flights from that plane for that day. If I had the choice between kicking 4 people off a plane and cancell

By cancelling they could be cancelling all subsequent flights from that plane for that day. If I had the choice between kicking 4 people off a plane and cancelling potentially multiple flights I don't get how cancelling the flights would be better? Getting pilots and planes where they need to go after the planning gets messed up is incredibly expensive and also screws a bunch of passengers