Swimmer Lia Thomas, who became the first openly transgender athlete to win an NCAA Division I national championship earlier this year, is responding to criticism against trans women competing in sports. “Trans people don’t transition for athletics,” Thomas said in an interview that aired Tuesday on “Good Morning America.” “We transition to be happy and authentic and our true selves. Transitioning to get an advantage is not something that ever factors into our decisions,” she added. The former University of Pennsylvania swimmer first made national headlines in December after posting the nation’…