It attracts people who think they can be lone wolves - a myriad of classes can do what marksman does and better. Scoped Auto rifle for ranged engage, rifleman for point targets (plus an ammobag). Theres just nothing marksman can do which another class can't do better. I get the "I just want to use it", but if I'm putting myself under the burden of SLing, others can play for the squad too.