I think you’re probably right about home repairs. People would rather hire it out. It’s not a function of ability (maybe a little self-confidence). A wise man once pointed out something that I knew but never quantified. If you take your paycheck and pay all your bills the remaining amount is discretionary. You can either put it in the bank or spend it. If you look at the discretionary amount as what you actually earn (get to keep) then it should be broken down by the number of hours worked each weak. For example: if you have $100 of discretionary money and worked 40 hrs week then you’re getting $2.50/hr. If you buy someone else’s labor then you are paying them with your labor at that amount. If you have a new roof put on and the labor is $3000 then divide that by $2.50/hr. You’d have to work 1,200 hrs to afford it. Put another way, you would need to work 30 weeks (at 40 hrs per week) to earn the discretionary money to pay the roofer. I could do it in a weekend with 1 or 2 friends. Actually, I did my garage roof in about a day with little help.
Good try on the test. I bet if you tinkered a little with the car over time you would have figured it out first thing. When my engine died it simply shut off like a switch. There was no sputtering or anything unusual. At the same time my dash lights went out but I still had other electrical functions. I suspected that either a fuel pump fuse or engine management fuse blew. All I needed to fix it was a flashlight. Today’s cars often have 2 sets of fuse boxes. Since it was the engine I checked that fuse panel first. Each panel comes with a fuse puller so I pulled the fuses one at a time until I found a bad one. Sometimes cars come with spare fuses but not in this case so it was a matter of using a fuse I didn’t need drive the car. I think I used the air conditioner fuse. I was back on the road in less than 10 minutes. And yes, I now have a complete set of spare fuses.
I’ve repaired many a car on the side of the road with just a few simple tools. Obviously there are no guarantees but it always pays to try. I fixed a stranger’s car once by diagnosing the problem with a screwdriver (screwdriver jammed in plug wire and left near a ground to see if it would spark). We went down to the parts store and bought a $15 part and a $10 worth of tools. Back on the road in an hour (electronic ignition module). They were 2 older couples who were from out of town so it would have really sucked if they had to have the car towed to a service station (on a Sunday).