Do you actually think that Tesla's engineers aren't aware of crumple zones and car safety?
A similar situation occurred with bull bars in the UK. They protected the car they were fitted to at the expense of the person you hit. They were banned after public outcry - https://www.gov.uk/government/publications/bull-bars/bull-ba...
Your link explicitly states they are not banned.
> However, since 25 May 2007, it has been an offence for bull bars that have not been approved as compliant with those safety standards to be sold.