Lmao, I still don't know how to judge idols' singing ability

[love]

well, at the end of the day, we listen to vocalists we like, however they appeal to us.  there are singers like adele who are loved by MILLIONS even though, from a technical perspective, she has a lot of flaws that have ultimately done a number on her voice.  but you aren't listening to "25" critiquing her glottal fry or whatever unless it's your job or hobby to do that.

most people prefer emotive singers who perform feelings rather than perfect vocalists.  some people like the opposite.  there's no right answer.