In American society, people who don’t “demand” are seen as “weak,” and “weak” is bad. So, in order to prove our worth, we have to have “high standards” and demand “only the very best.” This is a great way to start fights, mess up your kids’ shidduchim and give yourself high blood-pressure.
If your boy isn’t Moshe Rabbeinu or your daughter isn’t a combination of Bruria and a movie star, maybe you could go with “good enough.” I’ve heard of shidduchim being broken over the most trivial gashmius.