A weakness of the learning theory as an explanation for attachment?

-Contact comfort is more important than food -Harlow conducted an experiment with baby Rhesus monkeys where there were 2 mothers, a wire mother and a towelling mother. Both would dispense milk and he wanted to see which mother could the monkey's form an attachment to. -Found that the baby monkey spent more time with the surrogate mother that provided contact comfort over the food mother. They also went to the comfort mother during times of stress -Contradicts the learning theory as it shows that attachment is formed through the comfort of the parent not the need for food