You're Correct!

If you tend to bend forward from your waist in an attempt to create your golf posture, you will display a posture that looks more like a letter C.

From this position you will find it very difficult to rotate your upper body well and as a result you will lift your arms up too much in an effort to get the golf club behind you. This will result in you standing up at the end of your back swing and if you now swing the club back down, you will strike the top of the golf ball.

When you take up your posture, you need to keep your spine straight so that you can rotate around it easily. To achieve this, take an alignment pole and place it down the back and on the inside of your t-shirt. Tuck the bottom of it into the belt on your trousers. Now stand up tall and straight so that your head, middle of your shoulders and bottom of your back are all in contact with the alignment pole. Keep these three points all in contact with the alignment pole and tilt forward from your hips. This will keep your back straight and help you to learn how to tilt forward from your hips, rather than your waist.

Tilt forward enough so that your arms are able to hang loose and away from your body and so they are directly under your shoulders. Relax your knees slightly to take the pressure off the back of your legs and your hamstrings. This will allow you to create the correct posture to make your golf swing from and with a straight back, you will be able to rotate around your spine and hold your posture as you do this.

If you take your posture up by dropping your head down towards the ball and hunching your shoulders forward, you will find it very difficult to rotate your upper body on your back swing. With your head dropped down, it will block the turn of your shoulders and as a result you will either lift your arms up rather than turning your upper body, or you will lift your head up out of the way. Either way, the result will be that the club head strikes the top of the golf ball, producing a low shot.

When creating the golf posture you need to maintain a straight back. When you do this, your spine acts as the axis for you to rotate around during your swing. However, if you do not tilt forward with a straight back, if you simply stand vertically with your spine, you will not create the correct axis to rotate around and as such you will find that you have to lift your arms into position and this results in you striking the top of the golf ball.

When creating the correct posture to play your golf shots from, you need to gently flex your knees to take the pressure from your hamstrings. If you bend your knees too much, you will create a "sitting" position where your upper body becomes too upright and as a result you will use your arms too much during your swing and have issues with creating a correct connection and maximum distance for your golf shots.