Red Pill me on AT-Rifle grenades

> don't need to carry an extra weapon with you
> decent enough penetration
> longer range than early bazooka / panzerfaust
I guess having to screw on a grenade launcher on top of your rifle kinda sucks but I think it outweights the disadvantages
unironically makes me question why they bothered with early Bazookas or even the Panzerfaust at all
(yes I realize picrel is post-war)