I think the problem is a bit harder than that. I've seen a lot of managers who were once technical, but whose last hands-on experience was years, or decades ago

I think the problem is a bit harder than that. I've seen a lot of managers who were once technical, but whose last hands-on experience was years, or decades ago. They have a vague idea of what they need to know/do but lack the skills to find things out themselves. and they turn into a major drag on productivity.