Modern carmakers might make them complicated, and you're well within your right to avoid those, but in general electronic propulsion is pretty simple. The problem is car manufacturing is a very expensive industry that's extremely difficult to disrupt, so incumbents aren't really worried about staying ahead of hungry competitors.
Go look at small-scale PEVs - ebikes, scooters, unicycles, etc. A huge, huge range of players making every possible variation under the sun, with simple designs and extremely low costs. This is what the car space is missing out on, because of regulations etc owing to their larger size and much higher danger levels that entails. I suspect many places have regulations that largely exclude smaller, simpler cars from being viable as well.
In the well established auto context we're talking about in this thread they are.
> Go look at small-scale PEV
Not relevant to the discussion at hand.
You're right that they shouldn't be, and don't have to be. That doesn't mean that the ones that actually exist in the automotive world actually are, and it's rather egregious to claim that they aren't. Doubly so when you try to substantiate that with devices that regardless of propulsion are drastically simpler, cheaper, and different devices. It's like trying to claim airplanes aren't complicated because a gliders are simple.
Not all of them are as bad as the BMW in the OP, but very few (if any) road legal mass produced EV's are truly simple.