Well they kind of work that way.I had to read almost to the end of the article to learn that there are ‘pre conditioning’ mechanisms built it, and it sounds like the user may need to even hit a button to start the process (owners like @dmclone will know the process better than me)
Before getting to that point I was going to make a dumb joke about how Teslas will need an engine block heater for cold weather just like diesels.