I could say the same about the Walking stuka and the Sturmtiger.
I know I shouldn't feed the troll but maybe he really doesn't get it.
Stuka; expensive, midgame, doesnt track units, howling sound when firing, can be dodged with average effort if you're not asleep in front of your PC.
Sturmtiger; expensive, lategame, takes forever to reload, slow, doesn't track, can easily be avoided once you see the ST raising it's barrel.
Greyhound; Cheap, fast, no teching required, reliably oneshots squads for 50muni, tracks target unit (even on retreat), comes late early game/early midgame.
Spot the difference yourself or l2p.