Carrying your baby facing forward is not the best option. It's not "cruel", but it's not ideal either. Embracing your baby, or having them embrace you is what your baby is adapted to do and quite naturally the way to go.
Ideally, babies should be carried in appropriate slings and wraps as often as possible. Newborn's hip joints are designed for a "ride on a hip". Angles of bones in the upper part of the thigh guarantee optimal position of a thighbone ball in the hip socket. There are many reasons for carrying a baby this way, including some psychological aspects. Manufacturers of baby-carrying accessories may be found on the Internet (...).
Carrying a baby is so easy for kangaroos, but a right bother for we humans, and I’m suffering. I’ve been hauling our little sumo for 8 months now, and my back is over it.
Parents in my practice commonly report, “As long as I wear her, she’s content!” Parents of fussy babies who try babywearing relate that their babies seem to forget to fuss. This is more than just my own impression. In 1986, a team of pediatricians in Montreal reported on a study of ninety-nine mother-infant pairs. The first group of parents were provided with a baby carrier and assigned to carry their babies for at least three extra hours a day. They were encouraged to carry their infants throughout the day, regardless of the state of the infant, not just in response to crying or fussing. In the control, or noncarried group, parents were not given any specific instructions about carrying. After six weeks, the infants who received supplemental carrying cried and fussed 43 percent less than the noncarried group.