What's wrong with engineers now days?

If cars where easy to work on there would be no money in them. They sell the cars at below cost and then they make up the profit in the aftermarket. Service, parts and everything else. And if you do not use the manufacturer approved parts and shops your warranty is void.
If work on a car is complicated the billable hours go up and more profits. (The car industry has learned from the lawyers how it is done).

There is worklists being distributed to shops that tell how long a specific job should take, an experienced mechanic usually does the job in a shorter time but you still pay for the full listed time. That is how a mechanic can pull in maybe 12-14 hours worth of work in an 8 hour workday.

All of this is taken in to account when cars are being designed.