At its most basic, this is a cult of qualification which no longer provides real value, it fails for a number of reasons I won't get into here.
When you disqualify arbitrarily, and can't find anyone because of that, its your fault for disqualifying everyone, not the market's fault for not having the ballerina that doesn't exist.
Want a programmer in a language thats only 10 years old with 15 years of direct experience? You aren't going to find it even when the creator of that language applies.
You pay to have the work done. That is the only legitimate requirement for hiring someone and remaining employed, and you can't go and change the requirements later when they show they can do more. Doesn't matter if they moonlight, are overemployed etc. That view to disqualify such people are in fact monopolistic practices designed to disenfranchise wages that are already low and distorted because of money-printing, they are not red-flags.
Its like the flawed type of thinking that "We need someone to do this work, but this guy is so overqualified he'll leave first chance; so we won't hire anyone".
You hire to have a job done. You don't get to be an arbitrary slave master. The moment you lose sight of this is the moment you ignore your immediate needs, and drive your company on a path towards failure, and if its a consolidated large company, that failure and bad decisionmaking will impact a lot more people because of the centralization/concentration.
Financial engineering can decouple the need for immediate action, but the tradeoff is that the risk of not doing things you should have done becomes far greater to your long-term sustainability, and its completely invisible. There is no place for deception and coercion in the hiring process. If the job doesn't exist, don't jam communication channels. Jamming channels is tortuous interference.