What's wrong with veneered wood cabinet doors?

Not a thing. Veneered wood actually has some hidden benefits over solid wood panels, other than just a price. They are more dimensionally stable which prevents warping and cracking. Also, you can get a more uniform look using a veneered wood door as opposed to solid. Nevertheless, proceed with caution, not all veneered wood doors are created equal. Be sure you are purchasing a veneered wood door from a reputable company with at least a 5 year warranty.