[bq]But if such attempts to alter sexual orientation actually existed and worked (e.g. a pill, etc.), what do you think might happen in the world?[/bq]
If you consider sexual orientation the result of an "illness" that can be "cured", does that mean you consider being heterosexual equally a "sickness" that can be "cured"?
And what of bi- or poly-sexuals and non-binaries or people who are sapiosexuals? What kind of "cure" do you envision for them? Are you intending that all of them should be forced into an "either-or" lifestyle, against their own will and contrary to what god has gifted them with at birth?
Are you talking about an Iain Banks style science fiction world where people choose their hormonal responses to others based on their current social situation and based entirely on their own free will, or a dystopian state where everyone is "corrected" according to the dictates of some horrificly invasive state that destroys personal freedom to the level of deciding for its citizens who they will and will not be allowed to fall in love with?
And if you can make people love what you want them to love, how far is that from making people vote the way you want them to vote?
Even assuming this is some sort of intellectual exercise intended to come up with an interesting plot for a story, what kind of world are you envisioning here, where even the most fundamental aspects of life are considered a "sicknesses" to be "cured"?
At that point, what freedoms would be left for individuals?
If the state you envision would dictate even love and feel justified in chemically "fixing" its members against their will, how would it respond to children who are left handed? Or people who pray to minority gods? Or who vote for minority parties? Or who are themselves minorities?