After reading everything over again, it looks like your Dad literally thinks of you and your colleagues as 'High School girls' and your profession little more than an elaborate hobby. As such, he doesn't think you're worthy of being taken seriously.
After all, if this is just juvenile, feminine playing around, not including everyone is just being mean, isn't it?
If your working life isn't the same as Dad's, it can't possibly be a real job in his mind. Believe me, I've had my share of that when I became a librarian. There were people in the family who thought my Master's program was 'a little course to help you in your job'.
Yeah, right and I've got a bridge for sale.
You can't change people who have that sort of attitude. All you can do is pull back and don't talk to Dad about business matters.