Nepotism was so rampant at one of my previous employers and one major reason I left. 

Nepotism is the practice of favoring relatives or friends in hiring, promotion, or other job-related decisions. It can damage a company in a number of ways, including:

Hiring unqualified employees: When people are hired based on their relationships, rather than their qualifications, it can lead to a decline in the quality of work. Unqualified employees may make more mistakes, which can cost the company money and damage its reputation.

Creating a hostile work environment: Nepotism can create a hostile work environment for employees who are not related to the boss or other decision-makers. These employees may feel like they are being treated unfairly, and they may be less likely to be productive.

Damaging morale: Nepotism can damage morale among employees who feel like they are not being treated fairly. This can lead to decreased productivity, increased turnover, and a negative impact on the company's reputation.

Legal problems: Nepotism can lead to legal problems if it is not handled properly. For example, if an employee is hired or promoted based on their relationship with the boss, and they are not qualified for the job, the company could be sued for discrimination.

Overall, nepotism will damage a company and will cost the tech company I worked at severely in the long run. How do they expect they expect to evolve if they all think alike? My last few months at that company, I saw their role being diminished with other regions and cities more tolerant, diverse, and inclusive. It is important for companies to have clear policies in place to prevent nepotism, especially in technology, where diversity of culture and diversity of thought is extremely important.