Not possible with today's safety rules. You mentioned this in passing but dismissed it without understating. You can argue it's not needed (and some probably are not needed), but this is just yelling into the wind.
Also, as Engineers we know that cost is related not just to simplicity but scale. Your dream car will never be at the cost you or like minded people will buy because it may be simple and featureless, but it will be expensive.
The electric car you're asking for will never exist unless you build it yourself or manage to import from a country with lax laws.