Concerned friend about food

Rant!
I just call from a friend. I told them my baby is starting baby food. Sweet potatoes.. pears. She flipped out! She said she is to young! She's 4 1/2 months old. Said I should be wait til 7-12mo old. 
Baby had silent reflux. She said, OMG your baby is going to aspirate into her lungs and it could cause serious damage and hurt her! She was just flipping out that I would do this. We have the OK from her pediatrician. 
I want to scream lol