Marilyn: This is a good question for a Family Lawyer if you want to change things for the child.

I think your ex is right. Time with a parent trumps time with a babysitter anyday.

Regardless of who is right, you have nowhere to go with this. Your ex is fully in control of what he does with the child on his days.

This is not a life or death decision. I suggest you let it go.

So pre-school is a babysitter? I beg to differ.

Yes,
Pre-school is LARGELY a babysitter. I will grant that there is some benefit to socialization and learning to function in a school-like setting.

But it doesn't matter if you agree. You have no control over your ex-husband's actions with the child on his time. You are better off gracefully dropping the matter rather than making yourself look like a control freak.