Is it permissible to act upon the words found in the aforementioned link?

The weakest researcher who discredited the Hadith about musical instruments did so for a reason unprecedented by anyone before him, relying on the premise that Atiyah ibn Qays (one of the Hadith narrators) is unknown. This is unfounded, as he was authenticated by scholars other than Ibn Hazm. Imam Muslim narrated from him, Imam Bukhari cited him as evidence, and he was authenticated by Abu Hatim, Al-Bazzar, Ibn Hibban, and Ibn Hajar. Ibn Hazm himself deemed some well-known imams as unknown. The summary of the refutation to this research is:

1. Its contradiction with more than ten Hadith memorizers and critics who authenticated the Hadith. 2. Its discrediting of Atiyah ibn Qays, whom no one else has discredited, and its questioning of the authentication by Muslim, Ibn Hibban, and Ibn Hajar. 3. Its claim that Muslim narrated a Hadith from Atiyah as corroborating evidence (shawāhid). 4. Its statement: "Ibn Hajar's rulings hold no value." 5. Its claim that Ibn Sa'd's statement about a narrator, "He was well-known," is not an authentication.

It is important to note that the Hadith about musical instruments is not the only evidence for the prohibition of musical instruments.