if you really don't understand this, then a quick refresher on supply and demand.

A market price is determined by the intersection of supply and demand. Do you understand this concept? If not, I can use examples or link to better explanation.

Adding highly skilled immigrant workers to the labor pool will marginally effect labor prices (most likely hold them from rising, not decreasing them). So the talent pool would be smaller, maybe worse / maybe better, but definitely higher priced.