I noticed male idols usually encourage this behavior the most, of wanting their female fans to stay single for them.
This isn't my first time seeing things about this in kpop, but my most recent one is with Yuma from &TEAM.
I watched his recent Live and basically a fan said to him how she don't want to get a boyfriend because she love him so much and he has her heart.
And Yuma was just like "there's not much I can do about that"...like saying he can't help that she love him so much, basically as if he was flattered by it.
Another one with Jungwon from Enhypen.
This one is more so a idol telling her not to date and just stay on Weverse all day watching him....basically encouraging the behavior.
Alot of fans in the comments were saying things like "if Jungwon tell me not to go on a date or to break up with my boyfriend, I will" and "I have no problem staying home and being on Weverse all day etc".