Vehicles these days, where are we going?

I bought a 2004 chevy trailblazer last september and have had several problems with it, O2 sensors, bad starter, ignition switch. GM is fully aware of these problems and for some reason decided not to recall them. Everything in my truck is plastic and multiple computers run it. I hate this. All new cars are built so cheaply and its making me worried, they’re made so that it is so difficult to work on that a home mechanic has no choice but to take it to the dealer and pay gobs of money to keep their car on the road. My father has a 1970 vette and the only thing that is electric is the battery, Hell I could probably fix everything on it with a ratchet and a screwdriver. Did the greed of car companies in the cover up of reliability and safety make autos a handicap instead of an advantage?