Why the "experienced" old dog game developer probably hasn't learned the tricks you really need.
Have you ever had the experience of listening to an exalted Deity of Game Design - and you suddenly realize what they are preaching is hopelessly out of date? Let's face it, experience in game development is highly over-rated. As hiring managers, we chase experienced candidates because it gives us a warm, reassuring feeling to have a CV with a long list of years behind it. Hiring is scary - a bad hire can be disastrous in so many different ways so hiring "experience" is a balm against our fear of lost development time, burned budgets, morale problems, lawsuits, etc.
The problem is that "experience" is an illusion.