That's because backpack style diaper bags are the most natural to carry and allow you to guide your little one around completely hands free. (earlymomentsmatter.org)
Most ergonomic backpack style baby carriers are excellent in weight distribution and allows the parent to comfortably carry their growing child in them. (babyslingsandcarriers.com)
Some reviews of baby carriers for this product report that the carrier is not firm or supportive enough for backpack style carrying. (abckidsinc.com)