If she had no other option but to abandon something and could not come out herself to put everything back in order, then the smarter move would be to cut her losses.
Even if she did end up throwing away something she had under her control, there would still be many more that she was controlling and could make use of in the place of Cerberus or anything else she would have to discard.
What Ash knew about Cheryl was that Cerberus was the main organisation based on how much more attention she put into it, especially with how it was named and structured.
She even knew about how Cheryl had operated in the background and how she had other influences under her, as it was something that had been revealed in her prophetic vision.
The best way for her to get to Cheryl was through Cerberus or to have a chance encounter with her.
The highest chance of her encountering Cheryl was through Cerberus, but it required a whole lot of luck.
