A sword is not a toy.
It is an offensive weapon designed to pierce or cut the skin.

When you pick up a very sharp knife you are immediately cautious.
The slightest act of carelessness may result in a cut.
A blade can part skin easily.

Now, imagine a sword blade?
This is a dangerous weapon. It is not to be trifled with.

Performance art swordsmanship makes a mockery of the weapon; understating its seriousness.