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Not all growth points you in the right direction.
Let's start with an example: You're a racing channel that's focused on Forza Horizon 6, but the series that's really kicking off your channel is your WWE playthrough. You weren't expecting it to blow up, and now it's bringing people who are more interested in WWE than Forza.
Depending your answer, this could be interpreted as a good or bad growth. Are you willing to pivot? Are you willing to dive into WWE, or at least dip your toes and test the waters?
If yes, then this can be a potential good growth as you move away from being a racing channel.
If no, then this is bad growth. Like mold. And when mold grows, you must remove it for you health and longevity.

Sudden virality can hurt too.
Going viral sounds like a dream until you're not ready for it. If a thousand people showed up at your house tomorrow and said, "cook us food," you wouldn't be thrilled. You'd be overwhelmed, confused, and wondering how they found you in the first place.
If you're not prepped for the follow up, it can be a lot. A lot of times, people can't deal with that overnight level of fame.
As creatives, we tend to focus so much on not growing, we don't plan for when we do. Have a plan for both scenarios. Know what you'd do if a video took off tomorrow.