It's an interesting take on the matter, and I like it - even if certain individuals in the Shadowrun canon (Mercurial) are both cybered out the wazoo and are megacreative superstars...
Creativity is 90% effort, 3% blood, 3% sweat, 3% tears and 1% inspiration. I'd say they'd have a team behind them, Ghost writers if you will. Harder also doesn't mean impossible. The creative periods, ideas are just that bit further apart than they were when when there was less cybernetics. The ideas might just need more work as well.
Sounds like a plot hook to me, that people really can't know the real cost of the cyberwear. The secret of a ghost writing team can't get out at any cost. That people in the crowd are plants, to make sure people see and react to a certain pop star.
