It's very similar to the horse/buggy and car arguments of years past.
OP is advocating for developing efficient systems that are also easy to maintain. It is a valid concern.
You pretty much need trade school to become a qualified mechanic anyways.
Additional, with trade school one can increase the amount they can get paid.
They educate on all vehicle types too, not just ICE.
The Land Cruiser requires a lot more of my time working on it, but it’s a dream. I can fix something in a couple hours. The diesel, it’s a nightmare. Everything sucks working in it. Access is horrible, I end up having to jack into the CAN bus all the time, I spent a while with an oscilloscope plugged into it a month ago, and I’ve had to write my own software to interact with it.
Modern cars are more computer than car, and they are pushing more and more towards being fixed like them. I’d rather work on an electric car… what wears out? The cooling system? A bearing? Simple.
It requires maybe a bit of research but it's not impossible.
Are you also able to rebuild your engine and transmission? Service every sensor on board your car? Have access to a diagnostic computer and dicern those codes?