Originally Posted by nuclearlemon
Not likely - when you install body parts you're either welding or bolting. Any warpage is basically formed out during assembly. The seam sealer is just to fill gaps and provide some adhesion. The tricky question is why a given part might be bolted and ALSO welded to the same other body part it's being fastened to. I'm sure there's a reason, and wouldn't be surprised if it were just some logistical assembly thing at the factory rather than a well-thought-through engineering reason.
For example, the reason the frame is riveted rather than welded, is back in the day, they had not yet perfected their welding at the factory to where they trusted it as well as riveting, which was a more mature technique within their factory skill set.