The Levy Rozman philosophy of chess is that you win by playing bad openings to confuse the opponent.
As mentioned, he promotes playing Englund Gambit and Blackburne-Kloosterboer Gambit over Sicilian.
Playing good openings is too difficult for us because we aren't smart enough is basically what he says.
Caro Kann is solid but much more passive and slow than the Sicilian. They are different styles. French is also more aggressive as it allows c5 in 1 move.
Caro Kann allows black to activate the LSB but the concept is far more positional than aggressive. It just aims to trade off the weakness rather than striking at the centre with c5.