Banes, my friends, BANES!

Possibly you are using the term Huntsman to refer to something different than, at least, I am (not sure about everybody else). IMO, a Huntsman build uses the Bane branch, with relevant Bane powers (Surveillance, Cloaking Device, etc), but which focuses primarily on the rifle attacks. A Huntsman isn't refusing to take any powers, and certainly they aren't refusing to take powers for purely non-mechanical reasons. They take few or no mace abilities (most often, just Build Up) because getting into melee range prevents them from using ranged cones well, and because they don't want to deal with redraw, and because they'd rather spend that power pick and slots on a rifle attack. The rifle attacks aren't inferior to the mace attacks, they're just different, and a Huntsman focusing on rifle attacks over mace attacks is not gimping themself any more than a more traditional Bane focusing on mace attacks over rifle attacks.

A build that mixed mace and rifle attacks is of course possible as well, but that requires its own set of sacrifices.

Sure, I won't get picky over which attacks people take. I don't care for the rifle attacks in general, but they're certainly more ranged-friendly than the mace is. There are totally good reasons to take them depending on the circumstances. It's only smart to use the tools available.

Buuuut, a Bane that takes the rifle powers is still a Bane. You could go with the Crab branch and make a "Huntsman" with Fortification and Serum... and a backpack... but it's still a Crab. To be a Huntsman--at least so far as to adhere to the NPC the build was named for--would require using only Wolf powers. Wolf Spider Huntsman.

Technically, I guess, but I've almost never seen anyone use the term Huntsman to mean that.