Is it true that if you blend the porridge baby will have wind in the stomach??

Hmm I didn't know of this. But old people always tell me if a baby is having diarrhea or stomach upset don't give porridge. If blending porridge causes wind then won't blending any type of food causes wind too? Anyway for me I only grind the meat , the veggies and porridge I don't blend at all. I will cook until very soft and mash them