I believed it is all about the conversation topic, as you are a doctor and it is gave the feels like hardly to be approach especially its professional job title. Further, doctor job title seem like something serious where is similar to teacher, lawyer as we needed to be proper organised our life (no time wasting)...
Imagine, if the guy wanted to date you and he maybe thinking as follows:
1) Where is the place (proper place or something good)
2) Do we needed to have healthier food
3) Conversation topic
4) Do you be free during weekend or sometime...

Above is just what I'm thinking...