Simplicity applies universally and is almost always more correct. Simple just means the option of fewer steps. Simple does not mean easy, so therefore simplicity as a principle is always objective and measurable.
Where people fail on this most frequently is reasoning in first person pronouns whether explicitly or implicitly and whether or not stated, thought, or considered. Simplicity is but merely the result from a comparison of measures. It’s not about you and has nothing to do with your opinion.