Except world best forwards, you have too be lucky in CL, luck is the big part of the game, yesterday 3 of 4 goals of Bayern could be canceled, Borussia's 3rd goal against Malaga was scored from the offside etc. etc.
You're right, but you really need a striker at least capable of leading his line. I mean could you imagine any of Juve strikers scoring 4 goals in a single match? It shouldnt be the standard, but there needs to be a clutch up front.