Trueflight behavior was moved to Career Skills from dedicated weapons because it proved practically impossible to balance with other weapons. Even after balancing the behavior itself and reducing Trueflight Bow’s ammo to as close to unusable levels without rendering it such, it was the number one choice for Kerillian, especially making the Longbow completely obsolete.
If you want that high a level of aim assist, pick Pyromancer or Waystalker and build for cooldown reduction. If you want to additionally reduce the need for aiming, go in for Swift bow on WS, and you’ll have ammo to waste and the attack speed to do it. I find it incredibly fun to spam arrows everywhere, too (even if that brings with it relatively high numbers of Friendly Fire damage, but that’s a point of practice).