Many of these bands do play in the area when thay can, but a lot of them either don't play out live or they perform outside of the Lehigh Valley area, such as Philly, Reading, Harrisburg, etc., where they do book original artists more regularly.
If you want to see these bands perform more often in the LV area, ask your favorite venue (bar, club, etc.) to look at booking them and other original acts. Remember this, your favorite artist (50 Cent, AC/DC, Robert Cray Band, etc.) all started out as newbies somewhere.