Possibly.
But LAX-LIM or LIM-LAX are always so packed and busy that I think the GAs just want to get the plane out ASAP.
Like I said before, it was ridiculous on LIM-LAX. I think half the plane were just coming back from the inka trail and everybody had obvious overstuffed carry-ons and backpacks.
As I originally mentioned, this is one where LATAM could make money. They literally open your bags and inspect the contents before boarding at the door of the jetway, it would take a second to weigh or put the bags in a sizer before approaching the tables where they inspect the bags. That would save time for the people inspecting contents too.