I do have a walk around the car before I set forth, but stuff happens.
Some drives are very long -- hours and hours between stops. I've had tires that aired themselves down during a drive. TPMS can alert me to that issue before I get an opportunity to have another walk-around, so I can stop and address it before it becomes a safety concern.
It's fine if someone want to live in a world without monitoring systems; anyone is free to drive an old car with points ignition and a carb if they want (or mechanical diesel! with an air starter, even! no electricity needed at all!).
And sure, there's a certain joy to driving something of relative mechanical simplicity.
But I like modern cars. And I like things like temperature gauges, closed-loop electronic fuel injection, oil pressure indicators, ABS, traction control, backup cameras, and [I dare say] tire pressure monitoring. I like cruise control. I like headlights that turn themselves on when necessary, and off again when they're unnecessary.
And as one might correctly surmise: It doesn't have to be that way: There's other ways to live. A person can also choose to walk, ride a bike, use a horse, commit to a lifestyle that is centered around public transportation, or whatever. The world is full of options.
I've chosen my path, and you can also choose yours.
(And no, that doesn't make me inattentive. My path involves both a belt and suspenders.)