I think this is a myth. Bennett is, and has been for some time, perceived to be the weak link in the back 3.
His tackling (for me) is frequently the best. I think he's more positionally aware than most give him credit for. I also think he has been working on his passing a lot, and has added a fair amount to his game in this regard. This is important, as if he didn't, closing down Neves and Coady as our 2 notable passers would be easy for most teams. Bennett has played both short an long passes well recently. Last night his pass accuracy was 89%, better than anyone else on the pitch. That included numerous longer passes to Raul. He also looks for Neves and Moutinho a lot.
Boly gave the ball away repeatedly in the first half. Boly has moments of class in him, but gets a huge amount of leeway imo.