Isn’t it a gemara Asur l’odom sheyikadesh isha ad sheyirena? There is no crime in wanting to be attracted to a potential wife. It is not shallow. It is a metzius. Of course the midos and personality must be there, but if one is totally turned off by the looks, then it is rare that one will go ahead and marry the person.
Most men are attracted to about 90% of women in their age bracket, or we would not have so many halachos like yichud, etc. He just wants to verify that he finds her pleasant.