No, it should be illegal!
By athletic trainers needling clients, is equivalent of acupuncturists performing surgeries, that surgeons perform. For a surgeon to perform a surgery it takes a decade or more - attending years of school, practice, constant studying, passing all exams, obtaining board licenses.
Acupuncturists are not allowed to do what nurses do, like Botox, IVs - why should athletic trainers dry needle patients? No logic.
Obtaining an acupuncture license requires at least a Masters of Acupuncture degree, years of in depth studying and training in acupuncture, learning theory, and clinical training in treating patients with acupuncture under strict supervision.
It includes numerous exams, not just in acupuncture, and western medicine, but also in fundamentals of eastern medicine. It requires liability insurances. The cost to obtain all that and pay schooling and boards is in tens of thousands of dollars and takes years.