I agree with you, but I find the general consensus around reffing rugby interesting in that being technically correct seems to be less important than in other sports, for certain cases.
I suspect it's the similar mindset on why a knock-on is commonly called for a dropped ball from hands that went straight down, or when it accidentally bounces off the foot of the ball carrier before it hits the ground, and clearly wasn't intended to be a kick. I don't agree with calling a knock-on in either scenario, because I like to be pedantically correct usually. But I've observed I'm usually in the minority on this.