I have always been of the mind that any manufactured item, that requires regular maintenance, should be designed to make it fairly easy & not expensive.
Oil changes, headlights, brakes, transmission fluid & filter changes, battery, air filters, spark plugs & wires, distributors (when they used to be used,) and even clutch & pressure plates for the manual shift cars, alternators, starters, & water pumps.
These things wear out, or need regular replacement.
Now,, many of these things aren't necessary anymore due to improved designs. Manual shifting is mostly gone in regular transporting vehicles. Distributors are gone. and even the transmission fluid & filter changes seem to be lasting longer.
And as noted above,, it used to be a Dealership was used mostly for more serious repairs, or by those who have very little mechanical abilities.
We also had many small business shops of mechanics all over the country that could do many of the same things a dealership could do,, yet often a bit cheaper.
But to put it simply,, PROFIT is a driving factor in all businesses.
Dealerships hate the independent shops. So they require "Certified Technicians" to assure a warranty.
Then the manufacturers (bean counters driven by the amount of stock they own,) demand things be designed as cheaply as possible,, to heck with maintenance, knowing that a dealership can & will get to work on stuff, allowing them to sell OEM parts. As the old saying goes,, "one hand washes the other." And when people have too many problems,, they sell or trade & buy a new vehicle.
I've said for decades that anything that requires maintenance, should be worked on by the designers for at least 2 years before they are allowed to work on actual designs. Even the dealerships hate to work on many things. But they know they will get to charge a LOT to do the work.
Now, add in the "new" gizmos that people think they have to have in a vehicle,, OR the ones required by the laws. Much of the new stuff is not as necessary as they make it out to be.
A good example; Tire pressure sensors. Have one go out,, you can be pretty sure that if you replace one,, all the others will be in need. The sensors cost $30-$75 each. Then you have to have a tire shop install them. PLUS,,,, they need to be "calibrated" with each other for the vehicle. Another expense. All because somebody thought we needed an idiot light & warning buzzer to tell us we had a low tire.
And don't get me started on the cameras on cars now. I know a guy who's been a Mercedes expert for decades. Yet,, he retired,, saying he was GLAD he was retiring due to the increased number of the cameras & how much of a PIA they were to work on.
I've made a comment on auto engineers here before. I got some heat for what I said, so I won't repeat it.
But I will say it's not just auto engineers,, it's in ALL businesses. Sadly, vehicles have so many things in them that need maintenance or repairs,, they they should be the leader in preventing such problems or expenses,, but instead, they promote it.