Forward head posture has a great number of risks associated with it. And these risks and issues have been shown to worsen with age. A great many older Americans who have neglected addressing this issue find it difficult to breath, swallow, and perform ADLs such as driving. The earlier this is addressed and taken seriously, the better will be the outcome.
As with the environment, social inequality, etc. nothing is often done until it is too late or nearly too late. I try to get my clients to see fitness as something to be proactive about now, not to put it off until they have no choice.