Issue with milk is that besides lactose intolerance, it is also not very bioavailable. The casein in milk is not and the fat in milk is not. On the EN it often says MCT, that's the medium chain fatty acids they use since they are bioavailable, the higher the amount of MCT, the better you're going to digest the fat, and instead of casein some EN use hydrolised whey (not all, modulen uses casein, but their argument is that they want the TGF from casein). The reason EN is so expensive is because it's not like milk, they isolate the fats into MCT and they break down the protein from the whey by hydrolysing it, milk doesn't digest easily. All of the drinks that are cheaper and aren't really EN, have casein and milk fat, it's easy to make and cheap, hydrolised whey and MCT are much cleaner and better protein and fat sources, but it costs money to make, so that's why real EN costs money.
The only good thing about milk is that it's rich in TGF-beta, but then you can get this from modulen too, which is richer in MCT, and is much easier to digest, but too much TGF is not good either, because it can support fibrosis, you need a balance, enough TGF will help healing, too much can lead to fibrosis. There's a lot of money spent to convince people cow milk is good for them, the reality is different I think, most of the world is lactose intolerant, and milk just isn't very easy to digest.