For what it's worth: Fischer did proclaim 1 e4 as "best by test".
And just so I get it straight: is the OP claiming that 1 e4 is worse than 1 d4 because of the Sicilian? Because fearing the Sicilian is probably more irrational than my fear of the Samsich KID. And talking about the KID, I think it would be more correct to describe it as "unbalanced" than "unsound". Nailbitingly terrifying to play as either colour (I both love and hate the fire and brimstone of the middlegame struggle), but definitely not unsound.
You can lose against anyone with anything. It's not your first move that loses the game.