Disappointment - "This kind of stuff."

I was at Evangel bookstore yesterday checking out the Sales that was currently on. A lively group of brothers and sisters in Christ entered the store just a few minutes before closing time. I was about to leave myself. They were a jovial group and they seemed to be looking for a gift for another sister who was attending a biblical course. It was difficult not to overhear their conversation because they were so vocal and had fun laughing at the thought of what they were getting for the sister. All was well except for the fact that one of them made a disturbing statement (at least to my ears it was). Holding a new testament commentary by Frank Thielman, he said, "She would read this kind of stuff." The tone was not that of sarcasm. But the problem was that he viewed the serious study of the bible and doctrines 'too lightly'. It sounded like to him, the reading of books related to theology or any serious form of biblical study was to be considered a strange habit or practice for a believer to do. To him, a normal Christian did not read this 'kind of stuff'.

I wonder whether which would be considered normal, a believer who is serious enough to study more thoroughly the faith and doctrines that he/she has been imparted with or the one who neglects to do so?