Yes, but would his idol career be in a better state, if his current relationship with Hyuna had never happened?
It's rather obvious that you can be lucky in love (or life) while at the same time your career might be on a less fortunate level.
... And the reverse of course, you can be lucky with career, while unlucky in relationships.
They were dating for 2 years and nobody knew about it, yet he was doing great with Pentagon, he still gave fan service, performed, he did what was expected of him. So it's obvious that Hyuna had nothing to do with it. Cube acting like they didnt know they were dating. And salty fan girls who think they own kpop idols.