I believe the point is the wheel lines and to vary where the wheels go by changing the pattern each time you mow so you don't, for example, always drive exactly down the fence and cause a rut or mulch buildup or missed area.
I dont think it was "don't hurt the grass while you cut it" or "mow it four times in one sitting".
We people vary frequency with weather. Lawn tractors are heavy and, due to moisture, ground isn't always hard. On large properties some of the ground stays moist longer due to drainage issues. So yes, after years of indifferent mowing, one can detect where wheels have been moving topsoil.
Common lawn tractors integrate a mower deck. They're heavy duty riding mowers, but the terms are ambiguous. Large, commercial units can tow mower decks, but most lawn tractors used by property owners don't do that: it's hard to maneuver, and typically only used on fields.
You can do things correctly, with thought and attention even if they seem unimportant, or you can be a feckless dipshit. This applies to most things in life.
The argument is that it doesn't make a difference at certain levels of mowing.
From that perspective, it's like someone going over their strategies to avoid overloading their car's suspension when they're buying groceries. That's not a "thought and attention" scenario, that's a "why do you have half a ton of groceries" scenario.
I dont think it was "don't hurt the grass while you cut it" or "mow it four times in one sitting".