Alright guys, don't shoot the messenger here, I'm only sharing the facts haha!
Basically, Super Junior was never meant to be taken seriously as a music group!
I know what you're thinking, WHAT? But here's the story:
They were entertainers not musicians.
>> The members were picked because of their skills in variety, not necessarily music. <<
(this does not apply to all members, but it was the main reason behind the total formation of the group)
Most of the members in this group were chosen for their experiences as actors, MCs, models, and radio hosts prior debut. Heechul and Kibum were already established actors at the time, and most of the other members had already made various kinds of appearances in television and media.
This is why they had so many TV shows as a rookie group, before TV shows were as popular for Kpop idols.
Also explains why Kibum has disappeared from the face of the earth trying to pursue acting and why nearly all the members have radio shows.
Once their songs started to do well all over the world, though, they focused more and more on music and dance!
They still, if you notice, tend to focus heavily on acting, hosting radio, and guesting on tv shows.