Right, but tillage is not a set in stone practice. The Nebraska Corn Board is now advocating no-til corn planting[1]. Apparently it's already dominant in Western Canada and more than half of Montana cropland is managed without tilling.

Herbicide is a whole different discussion and probably too deep a rabbit hole so far down thread.

[1] https://nebraskacorn.gov/cornstalk/corn101/what-is-no-till-f...