I didn't even know BF isn't recommended for AM, though I rarely have the suggestions open or look at them so I don't really know them for many heroes. I suppose it's from the time when rushing a Vanguard was the prevalent build. Personally, I usually avoid making a BF on any hero.
Though I must say, Battlefury itself isn't actually bad on Bounty Hunter, it gives just the stats you need if you're about to have a good snowball and the added pushing/farming power is a bonus. However it's sadly common to see people think getting a BF and then farming alone and split-pushing like you're Anti-Mage is okay (or even efficient) while the rest of your team is pushing/defending and fighting elsewhere.