What are we teaching our kids?

How come all kids rhymes are full of horror? Can we be more positive?

Humpty dumpty falls
Jack and Jill fall
Five little monkeys are eaten by the croc
Five little monkeys jumping on the bed, fall down and break their head
Itsy bitsy spider gets flushed out
1 2 3 4 5, once I caught a fish alive.. fish bites him
Three men in a tub?!
Thee blind mice?
London bridge is falling down
I'm a little teapot, short and stout???
Old MacDonald had a farm.. and then we eat at MCD
Needles and pins, When a Man marries, His Trouble begins?
I do not like thee, Doctor Fell?!
Little Poll Parrot's food is stolen
Little Miss Muffet is frightened by a spider
Ding, dong, bell, Pussy’s in the well
Eeper Weeper, chimney sweeper pushes a wife up the chimney
Goose-a goose-a gander, throws an old man down the stairs
If wishes were horses, Beggars would ride
It's raining; it's pouring. The old man is snoring and he dies
Lucy Locket lost her pocket
Poor Jenny is a-weeping
Tweedledum and Tweedledee, Agreed to have a battle
Tom, Tom, the piper's son, Stole a pig
Three wise men of Gotham, They went to sea in a bowl?? Seriously?