if she just slipped it sucks (let's say doctors have a lot to worry so this is not bad)
if she did truly misunderstand, it's tough to tell
You're right, there are different views on this topic, in particular in the types of cholesterol elevated and decreased.
Anecdotally, my father and I discovered separately, in bloodwork unrelated to our individual diets, that a HFLC diet significantly decreased LDL and increased HDL.
Dr. Jason Fung has a few interesting figures in his book, citing studies where the consumption of eggs for example decreases risks, kind of fascinating.
Be careful what evidence you accept on this question. There are billion dollar industries doing their best to confuse the issue.
also try to search "ldl blood test" on r/keto, there are tons of people report much higher ldl after switching to keto.
n=17, so who knows.