I think academics and HR professionals have embraced SHRM because it can really help organizations. When HR is aligned with the company's main goals, many things improve, like employee performance and reaching company goals.
Of course, there are some personal benefits too. Some people may want to improve their career or academic position. For academics, SHRM is also a new topic to research and write about, which gives them good opportunities.
But overall, I think SHRM is a good approach that helps both the organization and the development of HR.