I wonder how many folks who enter healthcare find it's not really for them, but stay on because they've invested so much time and money into the process?
From my limited perspective, working in healthcare is the hardest job out there. Your customers are always in some kind of pain (physical and/or otherwise). Sometimes in order to help them, you have to add to that pain. In the process of helping them, you may be hurt (physically and/or otherwise) yourself. In healthcare, this is an everyday experience. None of my previous jobs involved this level of suffering.
On the other hand, if you can focus on the good you do and experience everyday, it's worth every bit of effort you put into it.