It makes sense that alters can be/do just about anything considering the fact that they're not actual real people.

Some think those with DID have other people living inside of them,real live,breathing, different humans inside them.That's not the case at all.It's a disorder,a mental illness.And it can manifest differently in different people.And can be experienced differently too.Just the same as any other mental illness,everyone experiences it in their own way whether it's GAD, Bipolar or whatever.People may share the same diagnosis but their experiences are unique.

So if those with DID had real children inside of them we would expect them to behave and have the same abilities as a real child that age.But since they're not real that's how I had a very advanced 4 year old,a 6 year old that could drive,etc.