Honestly I like the fact that you tried to draw a balance between two opposing sides, in my Understand your saying practice first aid but know that isn't the complete aid so visit your near by or family doctor, right ??.
That's really what is it for more, all that's left is for individuals and families to know their body and basic diseases by improving Physical intelligence.
Yeah, there is no sin by using self-medication if needed but we should not ignore a doctor's prescription.