The most popular and heavily marketed kpop concept is romance, and thus an actual romance fantasy is artificially created, marketed and sold.
This romance fantasy plays on the romantic desires of young teens and is an attempt to make them "fall in love" with their preferred idol/bias.
I don't know who the psychologists behind kpop idol marketing are (you already know that kpop idols are seen as "products" to be "marketed"), nor do I know their operations, but what they want is to try to blur the lines between fantasy and reality.
This is to make consumers (kpop fans) not be able to discern fantasy from reality and to make them fall in love more so more kpop idol/group merchandise is bought to increase profits, to make them think the romantic idol interactions are real, and to try to make them think their romance fantasies with their biases will come true.
That's why you can't tell sometimes if their gayness is an act or not.
They are trained to act gay and/or bi on camera (but most likely are not actually gay/bi) because the kpop companies have found a group of foreign consumers - the degenerate, very stupid, histrionic, highly neurotic, international American and European lgbtq+ communities. They are the reprobates that write the disgusting pornographic fanfictions, as these are their own sexual fantasies with their beloved biases/idols.
I suspect that the kpop idol lesbianism and homosexuality is to try to appeal to the lgbtq+ communities for profit, and lesbianism/homosexuality is put there by some possible zionist or pro-zionist foreigners who have been hired for kpop idol interaction planning.
Remember, for some odd reason or other, Swedish and other FOREIGNERS are hired to write kpop songs, be involved in kpop music and MV production. Why? I don't know but I can guess.
I'm guessing that since Lee Soo-Man has been knighted in 2009 by zionist Baroness Madame Philippine de Rothschild for having a positive relationship with her in 2008, darker concepts have been put into kpop music and MVs.
It's possible that these "foreign" writers and producers are pro-zionist, are secret zionists themselves or have social/financial connections to zionists.
Some idols don't mind or are pro-lgbtq+ but remember Korea is toxic and has old-fashioned views. They are predominantly intolerant to the lgbtq+ agenda.
The vast majority of idols aren't gay, lesbian, or bi. Only a few are.
There are are an unknown number of idols who are secretly xenophobic, even racist, colourist, classist, sexist, misogynistic, misandrist, homophobic, transphobic, and are materialistic and shallow. They don't care and will not change.