I think to be fair, if you’re going to include labor costs in the “total cost” of a car, you should include the price of a skilled bicycle mechanic in the cost of a bicycle, just to compare apples to apples.
IMO not enough people have the know how to fix their own cars. And I am surprised that this is not changing given 1. how ridiculous the price of auto mechanic labor has gotten and 2. the wide availability of DIY info on YouTube. Even just basic, basic stuff. I have friends who take their ~5yo cars to a mechanic (or worse: the dealer’s service dept) for routine maintenance like lubrication and filter changes, and they fork over $1500 for this! We are talking about $150 in parts and consumables here. The mechanic inflates this to $500 and then charged $1000 for his labor.
That would indeed be fair. On the other hand, I couldn’t repair the clutch on a car on my own whereas taking a bike apart and putting it back together can be done in my living room if need be.
On DIY: absolutely on anything not safety related. I‘d never touch the brakes. Changing oil is perfectly doable for a reasonably skilled diy person. If you like that kind of thing and have the access to the necessary infrastructure (especially for oil disposal), go for it.
But I like to take the car to a mechanic for another reason: in Germany you’re required to get regular technical inspections (TÜV), if the mechanic does it chances are better that it goes through without problems.
you don't need a skilled bicycle mechanic to ride a bike the way you need a skilled car mechanic to drive a car. i've rebuilt a volkswagen engine, but i still wouldn't dare to try to do all car repairs myself on anything more complex than a model t. bike repair is something anyone can do—badly, yes, but not so badly it's not a viable option
IMO not enough people have the know how to fix their own cars. And I am surprised that this is not changing given 1. how ridiculous the price of auto mechanic labor has gotten and 2. the wide availability of DIY info on YouTube. Even just basic, basic stuff. I have friends who take their ~5yo cars to a mechanic (or worse: the dealer’s service dept) for routine maintenance like lubrication and filter changes, and they fork over $1500 for this! We are talking about $150 in parts and consumables here. The mechanic inflates this to $500 and then charged $1000 for his labor.