The gemara in Eruvin praises Beit Hillel for consistently presenting the opinion of Beit Shammai even before presenting their own view on the subject. This indicates a significant value in presenting an opposing position even before presenting your own. It is more than a matter and lesson in respect; it positively impacts on one's own opinion.
In his latest Koshertube
shiur, Nishma's Rabbi Hecht expands upon this idea. We invite you to
view Why Quote Shammai Before Hillel at https://www.youtube.com/watch?v=uvv0zckuGro