you don't see many wingers still playing into their 30s. wingers and attacking midfielders peak younger than any other position, followed by fullbacks.
The role is heavily skewed towards physical attributes, pace and energy getting up and down the pitch. sadly for most of us there's a noticible decline in these things as we get older. other positions are able to compensate with gained experience and are able to extend their careers, which is why you often see wingers converting to central midfielders or fullbacks as they get older.