Can my 1 year old drink 2% milk?

I’m referring to the less fat milk. My mother in law in insistent on him having whole milk vs 2% but our WIC (provided by the government) gives us checks for whole and 2%.

I don’t see what’s wrong with less fat milk personally, what do you know? Is there a broad difference?

Technically I could be giving him soy milk right? It has all the vitamins regular milk has + omega 3 fatty acids and less fat!