>the same redundancy he does to the Model 3's frame.

If Ray Charles tried to shoot the broad side of the barn he's probably hit the pinch welds on a Tesla in the next town over. Superfluous part numbers (like their multi-piece wheel wells) and material excess is the kind of redundancy the Model 3 has the most of.

Tesla doesn't make efficiently designed cars any more than Juicero made efficient juicers. Tesla has carved out a market niche that they won't easily be unseated from but efficient design is not that niche.

You can simulate and model all you want. If you don't have the expertise in house you won't be able to get much value out of it.