On longer time frames a high win rate is possible with a reasonable P/L. Saying that, it needs to be a bull market for the longs or a bear market for the shorts, stating the obvious - trend following and choosing stocks carefully. Currently I'm running a high win rate and profits from getting in on a large number of quality positions at the March market low, very difficult not to make money in this type environment.
Long term commodities am 5-15% winning trades a year for past 25 years. Sounds awful, but losing percentages are lower since each position is hedged. The last trade is best trade with astro returns when R/R. But it never get rich quick way of trading often too early finding extremes, but once found, wait for deep retracements when masses think trend has changed, and add/hedged, sometimes been over 15 successful added trades till reversal areas. Do scalping, weekly, monthly where winning average goes up some but concentration is sometimes focused on making one tick or breakeven as all trades average down. Scalping, again the add ons lift up ave per trade, so can have a day where no 4 tick winners out of 70 trades, 1-2 partial losses and rest were plus one tick on original entry, 4 add on levels make for ok day. But I do not recommend ave down unless one does much back testing. Years gone by where high winning percentages just not necessary but concentration on low losing percentages and try to increase breakeven plus one tick.