The premium car will have lot more parts, like 26-speaker sound system etc, additional soundproofing, double-pane glass, heated _and_cooled seats etc. That takes work to install.

Next, the QA on a premium car has to me more stringent, simply because the expectations are higher.

So I can't imagine luxury car not taking more time to make than a budget car.

By all accounts, Tesla neither have particularly stringent QA nor a premium car level of interior.

By which accounts? I've honestly never heard anyone complaining about QA or "Not Premium Enough"

For example, Top Speed suggests that all other manufacturers are still playing catch-up. That it'd be nice if the seats had been updated a bit, but otherwise things are great.

http://www.topspeed.com/cars/tesla/2017-tesla-model-s-ar1729...

Oh? Don't you think buyers of premium cars expect more in the way of difficult-to-manufacture details?

Buyers of premium cars expect details that are expensive to manufacture. That doesn't necessarily mean that it has to be difficult to manufacture them or that the productivity has to be low.

I do. It just doesn't mean it's true or necessarily a requirement. Nor does it mean the car is better.

A better locksmith takes less time to open a door.

Did you just utilize an analogy concerning destruction to make a point about production?

Did you just use the word utilize to make your argument sound more coherent?

I utilize comment sections to keep my writing and argumentative faculties sharp. This is not how I'd normally communicate. I don't care about karma.

Yes. I can find another analogy if you like, but the message is the same.

Do you think locksmiths destroy the locks they open?

No. That phrasing was more pithy. Not wholly inaccurate if you think in the abstract, however.

Most of the assembly labour in order to create a Ferrari is manual labour. This is one of the reasons because they cost so much.

Oh, that and the fact that such cars can easily reach 300 km/h.