

Your quoted text clearly states she was meeting clients. That’s not allowed on a tourist visa (same rule applies in Switzerland). She was then told she could not enter the country and had to turn around – she refused and was put in detention (same rule applies to anyone visiting Switzerland). Other reports note that she was doing her online courses from NYC.
As noted in the article, she had been making a multitude of trips to NYC to meet with her clients all while on a tourist visa. That is a textbook visa violation and the same treatment would have happened under Biden.