You would be wrong. I suppose it's anecdata but a member of my family who works in pedatrics sees this regularly unfortunately. Usually it's these new-age parents that think co-sleeping is somehow beneficial. You fall into a deep enough sleep, it takes almost no time at all to seriously injure or kill your child.

Frankly, co-sleeping with a baby is irresponsibility of the highest form. It may have worked for the GP but for every one that it works, another 100 show up to my family member's office or to the morgue. There's no conspiracy in why part of the "how to handle a baby" guidelines they give new parents is "never, ever, EVER co-sleep". Its far safer to assume that the new parent is not in the less-risky population and will in fact eventually cause their child's death.