Critical thinking is about knowing how to organize and understand a problem or decision and come to conclusion. It is necessary for avoiding cognitive bias in advanced problem solving skills and decision making.
It can be easy to fall into the thinking that when I’m in charge I’ll do things differently. You do not have to have authority to be a leader instead you can exhibit leadership through influence. From choosing positivity to critical thinking skills there are many things you can do to be a leader even when you don’t have any authority.