The key is to find out whether being gay is an illness that requires medical treatment or whether it is a natural phenomenon which was unfortunately misunderstood over the years because gay people consisted of a relatively smaller proportion of the human population. If scientific evidence supports the former statement, I would defend the current law, which maintains that marriage is a commitment between a male and a female; but if science proves the latter to be correct, I would argue that current law violates gender equality and thus must be amended.
Hsu Tzong-li (2016) cited in "Hsu Tzong-li approved as Judicial Yuan pres." on The China Post, 26 October 2016.