Final answer:
A good recruiting source that might not promote workforce diversity is hiring based on ensuring organizational fit, which can lead to a homogenous workforce and potentially stifle innovation and competitiveness.
Step-by-step explanation:
A recruiting source that is good but may not increase the diversity and mix of employees is hiring based on organizational fit or sticking to traditional hiring pools. Many organizations prioritize cultural fit to maintain the status quo, which can result in a workforce with a homogenous perspective. This practice can inadvertently harm a company's ability to innovate and compete, as diverse teams often bring a wider range of ideas and solutions to challenges. Additionally, businesses that only draw from their traditional pool of workers, often white men, may find themselves lacking the necessary workforce to expand and may need to consider hiring more women and minorities to fill the gap. It is important for businesses to recognize that having a diverse workforce can provide a competitive advantage and introducing a broader hiring strategy can increase profitability.