I completely agree. I find an lmg becomes more usefull in milsims where ammo restrictions come into play. All the bigger games I've played allow support gunners to carry more ammo, plus if you've got a drum or box you never need to reload. I could see being pinned by a sniper being pretty frustrating, seeing as 9 times out of 10 you won't have a clue where your getting shot at from
I think both roles have there ues, I play with a lot of guys who run nothing but bolts and pistols, and there the ones that scare me. I think its more about who's weilding the gun than the gun itself though.