body stiffening

no one ever questions frame connectors...they just put them on! and no doubt they will add some strength.
Now i question everything and to me it looks like you are just adding 2 more studs to a stud wall.Triangulating the corners would seem to be more beneficial...just like the torque boxes ma mopar installed.
... nothing so strong as a triangle or gussets
the other thing i wonder about is why strength to the front as well as the rear is rarely considered?