The point is that it's a linear sandbox. Unlike many shooters, the game does not always guide you forward and you are often provided with a lot of room for experimentation. Some people just don't enjoy this, however, and run head first into fire fights without exploiting anything the game has to offer.For me personally, Crysis.
I love how that game looks and moves, but everytime i play it, it just seems like another pointless shooter that i have no real interest in playing.
That might not be for you, but that doesn't mean it's another pointless shooter.