Absolutely. The boxcutter was not a weapon you can use to physically subdue a crowd. In fact, no knife is. For that matter, most guns aren’t effective crowd control weapons, though a plane is lousy terrain for charging a gunman. (Not that there is such a thing as good terrain for that.)
The boxcutters were used to take people hostage and initiate (we thought) the old take over a plane and fly around for a few hours or days and then the hijackers surrender or get stormed and you go home and write a book about your experiences routine. Had happened dozens of times. The passengers all followed procedure and did not resist.
On 9/11 nobody knew there was a new meme in town, but the guys on Flight 93 took less than a half hour to figure it out and launch a counterattack.
Nobody will ever take over a plane again. They might succeed in blowing one up, but there will be no more hijackings.