In 1972 you COULD do that in a car.
With the modern computers and tight manufacturing tolerances, there really isn’t as much for the average end-user to do.
When I was young, my dad showed me oil changes with his 1978 Corolla, my 1985 Sentra, and our 1983 Chevy conversion van (THAT was a nightmare). I did them myself as a teenager.
My first new car was a 1997 Camry. It just wasn’t worthwhile to do it anymore, especially as you’re forbidden from doing car maintenance in apartment parking lots for obvious reasons.
So I could pay someone $20 to do to it in 30 minutes and handle all the mess and disposal, or save a few dollars, spend a few hours of my precious down time, and likely ruin shirt, pants, or both that would cost far more than the savings. It became a no-brainer.
It’s no longer cost-effective to maintain the average car. They are built to be used up and disposed of after 10 years so they can sell you another one, which is where the money is. Companies care only about pleasing those shareholders.
Especially now that so many of us have basically been enslaved by our jobs. We gave you a cellphone, so you have to answer it any time of day or night we might call. You’re salaried–there’s no overtime, you work when we say you do. If you don’t, we will find someone else. We will still fire you in a second if our investors think doing so will make our stock price climb 2%.
You don’t get a pension, you get a tiny price-match for 401k. You have to pay for your health insurance, we will cover SOME of it. We don’t care how long you’ve worked for us, or your age. If you’re 5 years from retirement we’ll still can you even though you can’t afford to retire yet and no one wants to hire someone that old because they think you WILL retire soon enough and it’s not worth the investment in time.
Publicly-owned corporations destroyed this country. The privately owned ones are the ones to work for, as long as you get along with the owners. They usually are happy as long as there is a profit. The public ones will lay off thousands despite making a profit because a bunch of analysts said they SHOULD have made more profit than they did.