In defense of many, many hard-working, smart gardeners, it's not always an equation of laziness vs. not. Many gardeners have plots that would be impossible to turn by spade and hoe alone, but are able to disc or till the acreage and have much greater yield than that which would come from a small plot. My great-grandmother hired a neighbor to disc up about an acre or two each year, and she then plowed it with a push-plow and wheel.
She hoed it each day by hand, and I presume occasionally watered it, if rarely. She continued doing this through her lifetime, not stopping until she was 85 or 87. She canned all she could.
There wasn't a lazy bone in her body. But she knew the importance of putting back food against hard times. And she was widowed for over three decades, so had no help to keep that garden.
It's unfair to impugn tillers. People prefer what they prefer.
Whereas it's true that seeds near the surface will sprout, they are quicly dessicated in the loose soil by light hoeing.
And, anyone who tills usually rakes the clumps and weeds to minimize regrowth, not to mention mulches, often with leaves or straw.