[belorn]

As their employer there are limits to what you can do, and there is also a cultural aspect that is forming how people perceive the issue (Netflix, the internet, seeing a lack of investment from the individuals).

There are things you can do to help. Provide flexibility, paid time and/or funds to do side activities like hobbies and sports. Have them participate in conferences or expert groups. Offer opportunities to test out new activities like diving, skiing, wall climbing, and so on. Not as a team building exercise, but as activities which employees can do to improve their own well being.