But cow milk in general (and especially in Whole Milk form) is well proven to be unhealthy in the quantities usually recommended.
There’s a good reason why nobody else drinks milk like Americans do. (Who were advertised to insanely aggressively and back room dealings brought about things like making Milk a standard in US schools.) Oatly is still really bad but the root problem is that in the US we drink more milk than anyone else...and we really don’t need it.