I think that there would be a negative impact. We're already seeing some of the effects after a decade of implementing these policies. Many people will choose a different career path instead of a career in research because they don't think that they'll be treated fairly and equitably given their personal characteristics.
Some of my friends left academia, while others were suspended or fired from their university jobs as a result of their views on equity, diversity and inclusion policies. We're losing talented people who could be conducting great research. They wonder what they're doing there. They could have a job in a bank and earn more money, instead of conducting research in environments that they consider hostile to their ideas.