This has nothing to do with a homespun wool contest. This isn’t a commercial setting.
As your link mentions, these sheep have been selectively bred to require shearing.
As your link mentions, these sheep have been selectively bred to require shearing.
When it gets into warmer weather and it's time to shear them, their wool starts to thin, and you get a "rise" - a layer about 5-8mm deep where the individual hairs are about half of their normal thickness. In the wild, these hairs would break and the sheep would shed all its wool in great chunks, but it also makes it a lot easier to shear.
If you've tried cutting the "normal" fleece with hand shears you'll know how hard it is, and it will absolutely destroy mechanical clippers.
That's not to say that sheep haven't been selectively bred to have a good rise, as well as other desirable characteristics - it's not dog breeding, no-one is trying to select for a deformed snuffly nose to please a dog show judge - but the rise was there before they were domesticated, or they likely wouldn't have survived.
Scottish Blackface are about as close to wild as you can get, and they're famed for their wool.