And example, in the US, is how much the population makeup has changed over time:
https://dailyyonder.com/census-report-unusually-informative-...
Go back to 1910, and more than 50% of the population lived in rural areas. And rural doesn't mean "suburbs". As this trend continues further back in time, I'd expect that people in their 30s may be living in cities in 1910, but we often not born there. They migrated from rural areas to the city.
Which means that city people even into the 50s had a very, very rural background.
So people who grew up on farms miles from any town or neighbours or stores, who had to rely upon themselves entirely, were the ones buying machines. But if you look at today, many people are apartment dwellers, or live in townhomes. They don't even have a place to fix something, let alone the tools or background.
I could fix any small engine before I was 10, work on cars before I could drive, and it's because you just picked up this stuff in a rural area. I guess my point is, if you don't know how to fix anything, and no one around you does except for specialists?
Then you probably won't care about owner repairability as much.
Sad, but probably a likely reason why we're where we are.