My question however is, why would i trust the "second opinion" of an online professional over that of a doctor WHO ACTUALLY EXAMINED ME in person?
Doctors don't have the time to learn all the latest thing happening in the health sector. So it's reasonable to check with another doctor. The off course depend on the matter.
Doctors also often go with what is the most likely cause for your symptoms. That's not bad in general because statistics don't lie but there might be cases where a doctor overlooks something. You could then ask him about what eHealth says.