I think it truer that there is more than one light in the tunnel. There are many exit signs... many corridors. But... only one to which my key fits that leads to the light my eyes can focus in. A tunnel can lead to many places... better the tunnel than a place you don't want to be, no matter how bright the lights may seem to others. If such weren't so there would be no tunnel and my eyes would never have lost their focus.
If it holds no value you have taken a side corridor. Others can hold expectations that compel us to go through the motions.... all the while the tunnel is there. An unhappy and unrewarding life.