Swimmers are essentially ice skaters doing all sorts of tricks on a slippery surface. Without balance, we can't do tricks like our catch, recovery, kicking, literally anything we want to do to move forward comes on top of maintaining balance while we do it. Every time we move without balance we "fall" and then FLAIL and we're essentially just flailing about down the pool unless we can create a foundation of balance and control it while we do power and slide moves. New swimmers look like new ice skaters to me.