Bean counters figured a buck’s worth of reinforcement is cheaper than paying for welding and then coming up with new part numbers and logistics for the new part. This way it’s easier to use the same part for all the applications and use an insert when a sway bar was called for.
You can always modify the existing arm by tacking the insert in place and welding plates on the bottoms if you really wanted to.
You can always modify the existing arm by tacking the insert in place and welding plates on the bottoms if you really wanted to.