German Panther Ausf. G tank among several vehicles used as targets for RAF Hawker Typhoon fighter bombers launching RP-3 rockets during trials in France circa February 1945
Even the casual observer of WW2 films of Typhoons firing the RP-3 sees accuracy was a problem. Gravity drop made aiming difficult especially when the plane was not flying level.
The 60 pound warheads had punch though.
The value of such weapons was no doubt behind the lines attacking logistics targets that would prevent enemy tanks from reaching the battlefield in the first place. They could certainly cause enough damage if they hit, but the chances of achieving a hit were minimal even in ideal conditions.
With a 60 lb warhead the peak velocity was around 750 feet per second if launched from a stationary platform, that's less than your average pellet gun. Compare that to the modern CRV7 that reaches a higher peak velocity than a .50 BMG bullet at the muzzle.