Is the 80/20 Pareto Principle Applies to Trading?

Been examining the Pareto Principle of 80/20 if applies to trading, but I guess it applies so. The 20% should focus on the number of trades, that is, be selective with the days or the time to place/make a trade, not just trade here and there that leads to overtrading and incur more costs in commission. The 80% should be concentrated upon the probability of the trade setup that has the highest percent outcome.