
And few would be encouraging you to breed if there was no intention to show, as otherwise why would you be breedng?
How would you gauge your dogs quality, and more importantly those of sires, unless you attend shows/events where you can see the results of breeders efforts.
Shows were originally and largely still are the forum for breeders to show off, compare and evaluate their breeding stock.
They of course provide enjoyment for both owners and dogs as a side effect.