I believe that farmers should not be pressured or forced into running unsustainable farms.
Although a lack of understanding about the negative implications of tilling and about maintaining productive soils may be a reason why farmers are continuing to farm in this way, there are also plenty of farmers who want to make the change, but it is too difficult for them. For example, in "Kiss the Ground", it was mentioned that tilled fields that produce animal field guarantee a profit. And, for someone who makes a living off of their farm, other sustainable farming options may be too risky for them.
I envision a world in which farmers are educated and supported so that they can move from maintaining monoculture farms that use strategies such as tilling, to farms that are more biodiverse and do not employ destructive techniques.
An intervention that could help with this is changing the requirements to secure subsidies. Note that my proposition is to change the requirements for existing subsidies, rather than introducing new ones. This is because simply adding new subsidies will not erase or cancel the impact of the other subsidies (which are more easily secured by monoculture farms that ultimately feed livestock). A specific type of support could be to provide farmers with funds to get a no-till drill (which was brought up in "Kiss the Ground"). This helps to retain water, promote the growth of microorganisms, and prevent runoff. This is a simple target for farmer financial support, but there are many other areas that can be amended to help farmers run more sustainable farms.