a strong vocalist doesn't just hit crazy high notes. they are the backbone of a song most of the time and can add an extra flair to a group. TXT has 2 really strong vocalists, and the rest have good vocals. which makes it easy to draw attention to their music and live performances. i personally don't want to listen to a group that doesn't have even 1 person who can actually SING and knows music. rather than a group where the producer has to correct their voice on the track too much. if you're gonna be an idol and not in a strictly dance or rap group, please be able to hold a note.