How is this less complicated? In your case you'd need to install something non-standard connected to high voltage power in the floor of your garage and then have to carefully park your car every time. It'd be expensive and tricky to install, and impose a mental burden every single time you park your car. Not to mention that it would have moving parts that are often put under strain (particularly in those instances where you don't park correctly) and it would be prone to damage and wear.

I believe the idea here is that this robotic snake idea should have zero impact on the user, and zero impact on installation, it should be a swap out replacement for the current charger. The only difference being that the user no longer has to plug it in manually. It may be a complex engineering problem but it's a simple, elegant design solution.