Critical reflection involves a critique of the presuppositions on which our beliefs have been built. Reflection gives us a new perspective.
Without it, we will lead blindly, we will fail to create anything useful and will create more issues 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 our mistakes.
Without reflection to guide us, we will fail to recognise successes or create any new ideas. We will fail to help others, 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.
Having made reflection part of my life and seen how it works for me, I would strongly recommend everyone try it.