I agree, it’s not like she can cross-examine Trump in a debate. She can say her piece during her allotted time (hopefully uninterrupted depending on the format), and Trump can ignore all of it, make up whatever he wants, and speak just as much as her, without any requirement to respond to anything she says.
So while her skills are certainly relevant, I don’t think the debate is necessarily the situation where I would say it’s her specialty. (Doesn’t mean she won’t do great, and I hope she does, but debating with Trump is definitely a “wrestling with a pig” kind of situation most of the time.)