While speaking of pets rather than professional services, this article nonetheless provides an effective case study. There is a persuasive argument that using purpose driven approach to strategy can transform a business and drive growth.
Because a purpose-driven approach facilitates growth in new ecosystems, it allows companies to broaden their mission, create a holistic value proposition, and deliver lifetime benefits to customers. Companies can make this shift in three main ways: by responding to trends, building on trust, and focusing on pain points.
https://hbr.org/2019/09/put-purpose-at-the-core-of-your-strategy