I am a parent who sets high expectations for my kids. They weren’t always happy with me, but they worked very hard and even surpassed those expectations. Children tend to rise to the standard you set, so long as it’s reasonable. Then and now I have a good and loving relationship with them. For one thing, expecting them to do their best isn’t mean, and for another, a strong work ethic produces nice results that they themselves enjoy and appreciate.
My son was a political science and economics major at Dartmouth. When he graduated, guess which major allowed him to find a good job? It wasn’t political science. So, I hear you, rosyoften.
That said, you do come off as harsh. Also, not sure I agree with forcing your D to minor in something unless she agrees it makes sense for her.