A new medication for migraine seems effective, but there is concern that the medication might exacerbate heart disease.
Conclusion
The concern about the side effects of this new migraine medication (that it might exacerbate heart disease) is unfounded.
Evidence
If patients with heart disease take the meds under careful medical supervision, then harmful side effects can definitely be averted.
Evaluate
If we were to say, , what would be a fitting objection?
I would say,
Similarly, this argument is saying, .
And we would want to ask, careless" medical supervision from a busy doctor that doesn't notice the potential conflict between the migraine med and the heart disease, then the harmful side effects could definitely be a concern.
Goal
The author is assuming if there is a way to avoid the potential harm springing from some action/thing, then concern about that action/thing is unfounded".