Oh come on, that's such a cheap cop-out. True enough to be worth correcting? True things don't need correcting because they're already true. You just don't want to acknowledge the science, man. It's gotten to the point that they've stopped asking "if" orientation changes and started researching "why" and "how" it changes:

Little research has examined whether experiencing sexual fluidity—changes over time in attractions and sexual orientation identity—is related to specific cognitions. ... Findings from this research link sexual fluidity with specific cognitions.

Even the expert witness for the SPLC recently conceded orientation is fluid and changes:

, Dr. Carol Bernstein, an expert witness for the plaintiffs and a well-known psychiatrist and Vice Chair of the New York University (NYU) School of Medicine, conceded that sexual orientation is fluid and can change. She went on to state that she has not conducted any research on the effectiveness of sexual orientation change effort (SOCE) therapy or familiarized herself with any studies looking at harm from such efforts.