you may have a point, and yes the broad heads used may be the key here,
but I totally trust that bow as, I've shot and had a few complete pass throughs on elk,
and that impressed me!.
especially after a buddy with a 55 lb draw bow hit a cow elk in the ribs ,
and it ran almost 200 yards before falling with a decent lung hit,
where the arrow only went deep enough to destroy one lung.
and since he is one of the guys I regularly hunt with,
I also noticed I get instant effortless pass throughs on deer and he rarely does,
and Florida deer around my area, rarely exceed 120 lbs
now to be fair, I hone my broadheads to a shaving sharp edge
and I doubt my friend does anything but install and shoot his broadheads
he and I both use a broad head that looks rather similar too, but longer than this broadhead picture ,
and no I don,t remember the name but they are 150 grain weight.