Lots of (surprisingly angry sounding) people in this thread blaming sleep deprived parents for not reading the manual of something that Should Just Work.
Comparing the risk to driving a baby around in a car is a fallacy.
The product is badly designed: once the baby can turn over there is a risk of suffocation and the product does not allow for that (but it should).
A better comparison is to compare this product to the same product without the design faults, be that mesh fabric or whatever.