The right to a speedy trial, the American expectation that conflicts within teams are resolved quickly, can indeed lead to judgements passed which are not ideal, optimal, right or even just.
Americans make decisions quickly, often hastily. But, if the decisions are narrow in scope – have been isolated – then they can be revised. There is time for reconsidering and revision. The parties involved in the decision can be brought back in.
This same logic applies to the American judicial system. It allows anyone sentenced in a court to appeal that sentence. An appeal is when the accused (and sentenced) can take their case from a lower to a higher court for review.
In the American business context, a team member who believes that the judgement is wrong, or the conflict resolution process was unfair, can ask to have that decision reviewed by next-level management or by a neutral third party within the company, typically the human resources department.