I think that OP is exaggerating a bit too much. In general, if you use Auto Part store brand, or Major brand oil in the specs your car calls for, you'll be fine for a commuter vehicle. My father was loyal to his major brand oil, and "never had a problem"... but I, the rebellious (and cheap) son, decided that Auto part store oil would be just fine. I asked my store manager what they put in their delivery trucks, and they said "Our Brand"...and "Our Filters" this oil is presently made by Warren Dist.
Since 2001, I've been buying oil from these guys, and every car/truck/van I own or maintain is retired due to rust, with the engines still running well, and NOT using oil. Since they salt roads in my state, vehicles usually have a 5-15 year life-span before rust eats them, if they are used on the salted winter roads. "not using oil" is defined by me as NOT requiring any oil added in the 5k OCI period.
If it's good enough for the delivery vans that run all day long, it's fine for my delivery van too. Pretty much every vehicle I've owned has called for 5w-30, and later models 5w-20... they are on the 5K mile interval on the "blend" oil from the auto parts store.... it's always worked for me.
I think OP is just frustrated at how deeply folks here dig super deep into finding "the best" oil ever. For Mr. Average's car, it's not a big deal, but If I had a fleet of delivery vans that ran ALL DAY, it would be worth the research to see if there is superior engine protection available. If I wanted to ensure over 300K miles per vehicle, sure!......as it stands, by the time I approach 200K miles, the vehicle is suffering crippling rust.