However, when you talk nostalgically about the good old days of cars being "mechanical devices one could understand and tinker with", and then turn around and talk about the new generation of electric cars being somehow equivalent, it seems a little logically inconsistent to me.

Make no mistake, a Tesla is just as much of a "hunk of plastic" when it comes to fixing or modifying it yourself. Expecting any complex piece of modern electronics to be similarly hackable to a car from the last century is a little unrealistic.

EDIT: sounds like we're basically in agreement on this. I misunderstood the previous comment.