Suppressing disagreement or dismissing alternative viewpoints in professional settings can lead to a lack of innovation and creativity, as diverse perspectives are not considered. It can also result in groupthink, where decisions are made without critical evaluation, leading to poor outcomes. Additionally, it can create a toxic work environment where employees feel unheard and undervalued, leading to disengagement and high turnover rates. Ultimately, suppressing disagreement can hinder organizational growth and success.