Oil level is not oil pressure, they are different issues.
You missed the whole part about trending changes and maintenance prediction.
Oil pressure shows you live, what is happening inside the engine. Its why Race cars , Drag Cars have giant gauges for oil pressure, etc.
Yourportion you clipped from wiki, further proves my point. Its for idiots that didn't watch their gauges.
Of course as a car guy you check oil level, coolant level, brake fluid level, but you want live data so you know what happening when engine is running. You can prevent failure before any warning light will.
Maybe you are a computer guy: do you want your PC shutting off to thermally protect itself without warning, or do you want to compare fan rpm and CPU temp trends to spot if you have thermal issues rising. Which could indicate thermal paste issue, or you have some other thing loading the system when you thought it was just your game.
People that can glean info from daily data trends know why gauges are important, even on industrialmachineas. Idiots just want a light to tell them something is already failing. It's the difference between reactive maintenance and proactive maintennace.
No, you can have oil within your min - max range and still have same oil pressure because its a sump system.
Oil pressure is not a good/bad measure, its a range.
Oil pressure tells you about restriction, viscosity, flow. You could have perfect oil level and various pressure readings depending on what is wrong in the engine.
You can't tell that with an idiot light.