The evidence doesn't support what you imply: that older people can't learn or come up with novel ideas. Fresh perspectives are important, but there are more way

The evidence doesn't support what you imply: that older people can't learn or come up with novel ideas. Fresh perspectives are important, but there are more ways than ignorance (e.g. youth) to find them. For example, cross domain work often yields amazing new results; it's a great way to bring in fresh perspectives.