I will reinforce what Steve has written about the strength of structural adhesives.
There are off road motorcycles with aluminum swingarms that are "glued" together, rather than welded. This allowed the manufacturer to use thinner aluminum "tubing" than what is required for a welded assembly, and results in a lighter swingarm. If you can imagine the forces encountered by the swingarm of a modern off road motorcycle with long travel suspension, you'll understand that adhesive assembly can easily hold the panels of an automobile together.
Your friend on the DTBB, George
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