Critical reflection involves a critique of the presuppositions on which our beliefs have been built.
Without it we will lead blindly, fail to create anything useful and will continue to create more consequences, we wouldn’t have had, had we used reflection as a tool. Without reflection, we may fail to learn, so will fail to get past any of our mistakes.
Without reflection to guide us, we will also fail to recognise successes or create any new ideas. We will fail to help others, primarily because we will fail to help ourselves. We will fail to correct mistakes and will probably go on to create more mistakes without understanding why.
Finally, reflection gives us a new perspective. Having made reflection part of my life and seen how it works for me, I would strongly recommend everyone try it.