"Misattribute" does not feel like the right word here. Unless I'm missing something, the lawyer is attributing Swift to asking the question in the podcast quoted in article, which is what the article's headline and body text say. Of course, it is clickbait nonetheless.

Additionally, do you have a source for the claim that her father was the actual person that "caught" this? I did a small search and did not find. If it is just a presumption based on his career, a more charitable take along these lines might be that she could have learned about securities from her dad sometime over those 30 years and thus could have not needed to consult him to know the question to ask.