You are right. "Opinion" was also the wrong word. I just felt that the shortness of the abstract yields some similar dangers of details and context being lost a

You are right. "Opinion" was also the wrong word. I just felt that the shortness of the abstract yields some similar dangers of details and context being lost as you have when reading only a headline. For example, one wouldn't use the valuable abstract space to reiterate shortcomings of one's method even if they are listed in the paper.