Lifting weights can help, but it can also cause more harm when your routine isn't properly balanced. Doing only bench press and military press lifts for upper body is going to be a chest/tricep push heavy routine.
If you're not balancing these pushes with pulls (chinups, pullups, rows, etc), it can promote issues like rolled shoulders, forward neck, weak traps, weak rhomboids or similar postural issues to those the author is trying to avoid in the first place. In fact, many lifters will add more pulls than pushes, because our day-to-day activities tend to be more push-oriented.
The point is, if you're going to lift, pick a beginner's routine designed by someone who knows what they're doing that has push/pull balance programmed in from the outset. Don't just pick a couple lifts that you enjoy and throw out the rest.
If you're not balancing these pushes with pulls (chinups, pullups, rows, etc), it can promote issues like rolled shoulders, forward neck, weak traps, weak rhomboids or similar postural issues to those the author is trying to avoid in the first place. In fact, many lifters will add more pulls than pushes, because our day-to-day activities tend to be more push-oriented.
The point is, if you're going to lift, pick a beginner's routine designed by someone who knows what they're doing that has push/pull balance programmed in from the outset. Don't just pick a couple lifts that you enjoy and throw out the rest.