Too powerful for what? Nobody shoved a Tesla or a Porsche down anyone's throat. This was a deliberate choice on the part of the buyer and/or driver. And the driver was 27, not a 21 year-old excited to have access to alcohol.
The problem here was a series of poor choices on the part of the owners and drivers of the vehicles in question. Companies should not be liable for those poor decisions, nor should the government restrict access to anything that can be dangerous when used irresponsibly, because the list of things that *can't* kill us is 0 items long. Sure, driving tests should be much, much more stringent, but competence is no substitute for using good judgment either, and tooling around at 0.21 BAC is well outside the realm of good judgment.