I hope that was a 'tongue in cheek' statement.
Of course you need to keep checking the oil level - a leak could develop at any time. Although unusual, it has been known, and checking the level is the best way to spot this before serious engine damage occurs.
The old advice used to be to check it daily, before starting the car for the first time. I suspect only the truly obsessive would do this today, but it should certainly be checked at least as often as you refuel the car. It's a good idea to check it under the same conditions; you'll likely get a different reading just after switching off than you'll get after it's been standing overnight.
Some advantages of checking when you refuel are that most filling stations are on level ground, most have weather protection, most offer paper towelling to wipe the dipstick on, most have disposable gloves to protect your hands, and most sell oil if you find the level is desperately low.
Back in the old days, before fuel stations became self service, the attendant would usually offer to check your oil level.
