Sometimes i feel like i can't tell whether i'd like a song that i like as much if it was sang by a lesser singer, but i guess it is near impossible to know the answer for that. However, I know that when i dislike a song very much, no matter how good the vocals are i'll still not like it. Something else i know for sure is if i don't like the singing style or vocals of the singers then there is no way i am going to like a song no matter what.
when i say vocals, i don't only mean technical skills or the ability to flex and showcase impressive vocal acrobatics. it encompasses everything, from the technical skills, to the emotional delivery, vocal tone etc
like for example in this song
i don't understand the lyrics but the emotional delivery in the singing makes me FEEL the song and i find that to be a very impressive skill.
i know that many people don't think technique is important to achieve this, but i think when you have the technical skills it lends you the freedom to explore stylistically and to focus on feeling the music and projecting that feeling to the audience without having to worry about messing up.
i think vocal/singing talent is a very beautiful thing and it is unfortunate seeing many kpop fans undermine and dismiss it. your favorite songs would be nothing but an instrumental and your favorite lyrics would be nothing but words on paper without vocals giving life to them and delivering them in a way that makes you feel and connect to the lyrics and the music.