There can be some truth in what you say about "so many bodily processes" but it all depends on the mode of action. If a drug has multiple independent downstream effects, it can certainly complicate things. But if it has a single specific upstream effect on a process that contributes to multiple pathologies, this can be very beneficial and offer a therapy for several seemingly disparate disease processes. Think of dexamethasone and aspirin, for example. ABL falls into this category and as we understand its pharmacologic effect at the molecular level I think it has enormous potential.