What matters in a car engine is the oil pressure, not the level of the oil. The dipstick was only installed in cars to let drivers know that there was enough in the sump for the pump to pick it up and provide lubrication to the bearings.
Manufacturers fitted an oil pressure switch when they became reliable enough to let drivers know there was sufficient pressure people complained that the pressure gauge had gone but came to realise and accept that the replacement was more than sufficient. The same scenario now applies to the dipstick and in 10 years you won't even remember that one existed. They were taken off gearboxes years ago and no-one complains and as for the fuel tank you don't go and dip it like they used to do you? Nope, you are confident that the gauge is telling you what you need to know and it is accurate, same applies to the engine management system (which also provides the feed to the fuel gauge) monitoring the oil pressure and level and telling you when there is something wrong.
In your example it wasn't the dipstick that told you something was wrong, it was the engine management system and you took the action it told you to - you put in some oil. All the dipstick did was provide you with the confidence in the diagnosis of the management system - which spotted the problem in a situation when you could never have spotted it.
Trust the car, hundreds of thousands of us do and we have no issues
