the only real work they're doing is the oil change and tire rotation. and because of those things they are able to do a "look over" of the rest of the parts on the car that are listed
for instance, because they are rotating the tires, they would have a chance to measure the brakes and rotors and take a good look at the suspension parts. and because they have the vehicle in the air to do this stuff, they are free to roam around underneath the car giving little "wiggle" tests to the exhaust so look at the condition of the hangers, check for rusted components, check the condition of the CV boots, etc.
literally you can add everything together that starts with "check" or "inspect" on that list and it would only take maybe 10 minutes total
so honestly the list seems long but there are so many things that are "kill 2 birds with 1 stone" kind of stuff.