When you use >2x leverage, you will have a slight short exposure on the borrowed asset.Compared to long positions, short positions have less exposure. With 3x, a short position typically has 1/3 the exposure of a corresponding long position. For the purpose of yield farming, this means your chance of getting liquidated will be much lower when short, when compared to a long position of the same size. If you needed to rebalance your position by adding collateral, it would also be less often with a short position.