He's probably thinking, "Okay, these pictures are nice but what else does he have?"
I was taking a class about 20 years ago. One day, I walked by an old, abandoned factory building with broken windows. Got a picture of that.
A while later, I was walking down the street and saw a broken beer bottle. Shot that.
Another block over, there was a car with the headlight smashed out. Shot another one.
By the time I got home, I shot up my two rolls. I went in to the lab, developed, proofed and printed them.
The prof. liked them and, after that, I got on a roll.
The next week, after that, I brought my assignment to class and the prof. said, "What's with all the broken sh*t?" He made me go out and do it all over again.
The lesson I learned and, what I think the prof. is telling you is, "Don't be a 'one trick pony.'"