I completely disagree that this is an expensive or hard to clean situation. I'm currently installing a car stereo, so I'm directly dealing with removing the carpets and liners and seats, and I'm here to tell you that it's super easy. For people with experience, removing every scrap of the interior including all seats is a single day job, no more. There are multiple people who have done this job so that they could put down better sound proofing to improve their audio experience, so they took apart everything down to the metal, including door liners.
Tesla made this all really easy to remove and replace. If you wanted to replace all the interior carpet and liners, that can't be more than $5K for all new parts. But disinfecting all that, especially out of the car, would be easy.
Seats are polyurethane, not leather, and can be disinfected easily. If you feel you have to replace the seats, that bumps the cost.
I fail to see anything here that would justify totalling the car.
