There is no reason children should be the only people with permission to play! We are not robots as much as the rush of life pressures us to pretend we are.
Is allowing yourself to prioritize playing or to engage in things that don’t feel “productive” hard for you? If not, I’m curious what types of playful things you’ve prioritized in your life as an adult. One that comes to mind for me is making the time weekly to get together with friends and watch a television series we are into!