Why is it hard to have a very successful solo career?

Quote from ellenote

maybe IU is the only exception, but everyone else has to rely on the general public for success

Is IU an exception? The new Melon chart shows that she doesn't have the mass streaming fandom either.

So her success is also from GP.

Quote from bbgc

Is IU an exception? The new Melon chart shows that she doesn't have the mass streaming fandom either.

So her success is also from GP.

really? I dont keep up with charts so that's shocking.