Of course if panna develops well in an individual that individual will see the not-self, impermanent, or unsatisfactory aspects of phenomena that arise from time to time naturally since the conditions are correct for it, ie. panna is developed within the citta and not-self, impermanent, unsatisfactory phenomena are arising based only on conditions. Because of this understanding the being will know that attachment and aversion are very dangerous because they force one to react to objects that are really beyond our control, not us, not belonging to us, and only bring us to misery, and so on. Seeing that disadvantage to attachment and aversion and understanding conditionality that being may think, "it would be beneficial if I meditated on the vileness of the body to dispel lust because attachment to this body comes up". The being feels this way because panna understands anicca, anatta, and dukkha from time to time and so it sees the great drawback in clinging or being averse to these objects. Understanding conditions, that being knows that it is wise to meditate on the loathsomeness of the body, for example, so there are less conditions for attachment to it to arise again in the future. Attachment arising less, in future lifetimes one will not be obsessed with sex as much, and not make as much mental, physical, and verbal unwholesome kammas because of it, and this is a good thing. This practice in itself will not remove lust -- only panna can do that, but it is still wise and the being feels naturally compelled to do so because his panna has already developed to a certain degree. At the same time, the being knows that although through methods like this, one can set things up so that there is less clinging and so forth, the conditions for panna penetrating the anatta aspect of dhammas is panna or wisdom on the level of understanding. Like corn growing in a field it cannot be rushed; once the seeds are sown one waits for the crop to grow without pulling on it to try and make it grow faster, which is impossible, likewise once the seeds of Right Understanding of sown, one allows panna to grow. In the meantime, if they being has accumulations and conditions to go and practice an object of samatha like the being above, one does. Instances of satipatthana can naturally arise, when the conditions are right, even as one meditates on a loathsome corpse of skeleton, and so on. In this way, one practices samatha because one has panna developed and one has accumulations for it.
Whatever an enemy might do to an enemy, or a foe to a foe, the ill-directed mind can do to you even worse.