That doesn't scale. The reason Tesla's not having problems is because they have first dibs. That only works for them because the companies who don't have first

That doesn't scale. The reason Tesla's not having problems is because they have first dibs. That only works for them because the companies who don't have first dibs are taking the hit, not because this is some solution to the issue of shortages on the macro-economic level. If everybody did what Tesla did and in-sourced, somebody who in-sourced would be taking the hit.