Also things used to be made to be repaired. Probably top thing was cars. When I was growing up 90+% of all dads did oil changes, tune ups, etc at home.

Cars of the era were meant to be worked on by average mechanic, you didn't need specialized tools and everything was more or less easily accessible.

Modern cars are no longer designed to be worked on by average joe. Even relatively simple things like "changing the battery" often involve multiple stages of disassembly / reassembly to accomplish. This extends even to things like placement of bolts. It used to be that bolts were placed in an orientation such that you could access them, now its just assumed that the car will be disassembled on a lift using specialized tools.