I never said EM made $500,000. I said a good Adult cardiologist can make $500,000. Adult EM makes around $300,000 and peds EM around $200,000. You will always make less money seeing pediatric patients, THIS IS A FACT. This cannot be disputed.
However, you're right, money isn't everything. If it were, I wouldn't be going for Peds. I am blessed to have a husband who is a Radiologist, so I could care less how much I will earn in the future. Thus, I am going into Peds because I truly love working with kids. Even though I know I won't earn much.
Almost every pediatrician I talked to (not residents, but working middle-aged pediatricians with families) tried to dissuade me away from Peds, telling me I'd be poor. They only left me alone after I said I was married to a radiologist and was doing it because I love working with kids and it makes me happy.