Adding bunches of trees will overfit the accidental patterns in your data. I have an explanation here why reducing variance is not the same as reducing overfit

Adding bunches of trees will overfit the accidental patterns in your data. I have an explanation here why reducing variance is not the same as reducing overfitting: https://news.ycombinator.com/item?id=20089890 https://news.ycombinator.com/item?id=20089890