A democratic State is supposed to work in the interests of all of its citizens. Degrading the economic environment to lead young graduates to "flee" is clearly against this mandate.
The strategy that you mention is however used, with success by countries that are either dictatorships (e.g Algeria) or that have too many men, due to archaic sexist traditions of aborting females (e.g India). Maybe you'd prefer that the USA become more like those two examples?
Some folks are basically against all immigration, not matter how you frame it.
Which seems weird to me as an American. All of our ancestors were immigrants, immigration is what made the US what it is. It feels like they want to turn the US into something completely unamerican.
The framing is weasely. Saying that black is bad does mean that white is good. If you need such argumentation to "prove" a point, maybe you are wrong from the start.
An educated, young person doing useful work that comes to your country is a massive gift, and a debit to the country they have left.