Yes they need to save money to keep costs down, that's why they do it. Elon's obsessed with manufacturing costs.I think Elon is a symptom of far bigger problems.
As for the hero worship, Apple survived the loss of Steve jobs. A brand goes beyond a persona these days.
The interiors of Teslas are simple to save money. No knobs or dials- just a 21 inch flatscreen. Great for going down the motorway in the dark when you can't operate anything by feel alone. Good job there is an autopilot because the driver on board won't be doing much driving with that in his lap. It should not be legal to have massive flat screens in cars.
Ev's need to be cheaper, he keeps working to drop the price.