Starting fly casters are taught to false cast on grass and the casts will be parallel to the ground. But casting parallel to the ground when fishing is an unforced error. When casting straight, the line and the leader will turn over several feet above the surface. It will take the fly time to drop to the water giving the wind time to mess with the presentation.
I noticed at a club meeting when we were doing accuracy that the back casts usually weren‘t high enough.
When you aim at a spot on the water’s surface the trajectory will become downward towards that spot. Because the back cast needs to be 180 degrees opposite to the forward cast for an efficient straight cast it follows that the back cast must be upwards.
Therefore the whole trajectory must be straight (180-degree rule obeyed). So, now the cast must look like this.
So, pick a spot on the water where you intend to place your fly. Now, drive the fly line straight to that point and try to straighten your fly line and leader just inches above that point. Now, the wind has much less room to screw up your cast.