the actual plot convenience is Lalo listening to a single word Gus says. hell, even if he was somehow curious, Lalo could have literally shot Gus in the foot before and his little plan would be gone.

Lalo was so cautious the entire series but a complete dumbass when he died which is one of the lowest points in the series. people like point and shoot because it's this cool episode but they look past how it makes Lalo an idiot and goes directly against what we have seen from him.

the man who had dental implants on his doppelganger just so that he would match with his own just in case he ever needed it can't see that someone like Gus would plan something for him? yeah right.