I've changed my own oil and done all the other scheduled maintenance on all my vehicles my entire life. Maybe when I'm 70 or so and no longer want to crawl under my vehicles, I will start taking them someplace for these items............
At least I know who tightened the drain bolt, the oil filter and all the lug nuts LAST time!
Same thing is true for my motorcycles - I always know who tightened the axle nut, the pinch bolts and all the caliper bolts at the last tire change.
YMMV