The article's writer states, and I paraphrase "although people state 33:32 applies only to the Prophet's wives, the verse to follow, i.e. 33:33, states to not display your fineries like they did in the era of ignorance, how could this possibly only apply to the Prophet's wives? Therefore all these verses must apply to all women even though they appear to only be addressing the Prophet's wives."

Well, we know that bit doesn't only apply to the prophet's wives, because there is another verse that addresses all believing women (24:31) which tells them not to display their fineries. There are also other verses instructing all believers to pray salah and give zakat.

Hope that answers your question.