Yeah, and don't forget it's a lever type system where for a simple constant chord symetricral section wing, the front dowls will take ~60% of the g-loading and the wing bolt will take the other 40%.

But the fact the bolt is already under a good couple of pounds load static (you do tighten them up?) probably balances things up a bit?

However 2 bolts would provide peace of mind if you relocate the hardpoints.