I'm not saying reptiles = bad parent. I fully intend to keep my nile monitor, and my retics when I have children. The difference is, the OP is worried about certain species of snakes harming the kid. The only way the kid should ever be around the snakes, is if the snakes get loose, or if the kid gets into the caging. Either way- that's going to come down to the caging element of the reptiles being kept.

Fact is, he's worried about for example- a blood python, around his child. The only way for that blood python to end up around his child (unless he's stupid enough to let a 2 year old play with a snake, which I'm going to assume he isn't that stupid), is if the snake.

A. Gets out
B. Is let out by the kid.

Seeing as though the requirements for both species are extremely similar- one can assume that being a ball python, or a blood python, they will have nearly identical caging. Leading to the same possibility of getting out or being let out. No difference. Either way, a 2 year old alone with a snake will probably get bit, regardless of species, because 2 year olds don't understand how to interact with it, and will surely injure the snake and it will bite out of fear.

If the owner is worried about the caging not being secure and the snake ending up near the child for a blood python, but not a ball- which will have nearly identical requirements.

That is why I say it's bad parenting.

Lets say the owner was looking at 2 dogs, he was worried that the pitbull could harm his kid if it got out of the kennel it was kept in. He is; however, not worried that a rottie kept in the same enclosure getting out could risk his child- because fact is, the same kennel could be secure or not secure for either dog, if he feels it's not going to keep the pitbull in, it won't keep the rottie in either, and that is the danger to the child, and that is why he shouldn't risk it.

Again, I'm not saying the animal is bad- he feels worried about his child interacting with snakes, it's breedism and that is stupid, and he clearly has expressed he doesn't show full confidence in his caging systems to keep the animals in and secure under all circumstances. I have several very large snakes and lizards- they will all be here with me even when I have a kid- because I'm confident in my enclosures, and the locks keeping the snakes in, and the safety precautions I've taken.