“The parents are older, wiser, more experienced and knows their child. “
Many boys are out of the house for many years, including high school, yeshiva, etc. Parents may not know the boy all that well. They are living with the image they had.
I had an “older and wiser” relative (not parent) set me up once because they wanted to be connected to the chashuv family. Like I said, they can be just as subjective. BTW, the girl was quite rude.
I have friend that admitted that he was attracted to a certain girl for his son based on the way she looks. He admits that he went after his eyes. B”H it didn’t work out. He asked a Rav for a good shidduch suggestion, and he son is happily married to that suggested girl. My friend said that this girl is not the kind of DIL that he wanted. To which I replied, that she’s the good shidduch FOR HIS SON. To which he admitted that’s what more important.