It means that ordinary retail investors are like leeks growing in the ground. They are simple and kind, have no "means" and are at a disadvantage. They can let a few people use some "means" to harvest, because "leek" will grow up after cutting.

"cutting leeks" in the stock market;

1, generally describing institutions, funds and large households: selling stocks leads to a sharp drop in the stock market (or individual stocks), ushering in new opportunities to open positions, and then re-opening positions at a low level, so as to operate in a circular band and realize circulation. It's called cutting leeks.

2, generally describe retail investors: buy stocks, buy sets, cut sets, cut and buy, repeated, heavy losses. Also called leek cutting.