I don't understand how one could be a NewJeans stan and go on about how they're "over"? If, in the worst case scenario, they aren't "NewJeans" after this - they've still made an impact as NewJeans that won't be erased. Most people know NewJeans as the girls themselves, not Min Heejin, and especially not HYBE.
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You should not underestimated how much damage their popularity can take if they are put on hold for an year and if they need to change dame. One year in kpop can be a long time when your fans maybe are kpop fans for a few years and then move on. And even if they don't like Hybe/Ador today, it was their support and money that made them the stars they are today. It's not that easy to replace that support and make in runining smothly from start.