"It isn't always a good idea to replace a bolt with a stronger one. Some bolts are deliberately chosen so that they are weak enough to fail before the stress or strain damages some more expensive or critical part of the equipment. For the same reason, in making furniture cabinetmakers use glues that are weaker than wood. That way, if the furniture is overloaded, the joints break. It is much easier to reglue a broken joint than to replace a piece of broken wood."
Is this true? I recall reading on this NG that regular wood glue forms a bond stronger than sold hardwood and when tested the wood breaks near the joint before the joint separates.