Check out this picture of how the dryer vent weakens the wall as the studs had to be mostly cut through (beyond the limits) to install this dryer vent.
Please recommend to your clients that they have Semper Fi Home Inspections inspect their new homes as they are being built – called phase inspections described here on our website. Services Page of Semper Fi Home Inspections
Our inspectors can catch things like this so they can be corrected by the builder – before they are covered up with drywall.