I actually think you guys have a point. The Howl wasn't the Howler's only weapon. They were nearly impossible to injure, they had those metal Wolverine claws, and they kind of had a lazy-susan waist so they could use momentum from blows against their opponents. I mean, Crayak also armed them to the teeth, which I doubt is written in their DNA, but even with all of that, they're probably a better fighter than a Siberian tiger. And the howl may have been impractical, but if they were ever in a pinch it would have made an exceptional last resort.
idk. I'm kind of surprised, thinking back on it, that she didn't make some handwave to remove the Howler's DNA from the game, like she did with the dino-DNA in MM2. Or maybe she did, and it was just implied, since we were screwing with Crayak and the Ellimist and those two can basically do whatever the hell they want.