Avira, a good question. I would think anyone who learns would encounter numerous discussions in the Gemorah where multiple opinions and schools are respected and analyzed. Maybe Beis Hillel gives you a way forward by first explaining the opposite shitah.
Furthermore, it is a halakha that you often need to follow other minhagim, at least chumros, when visiting/davening with other groups. This requires knowing them to certain extent.
A practical question is how and when to introduce kids to other minhagim. Maybe the best would be for the kids to see their parents being respectful when interacting with others. Highlight to them what you learned from Chasidishe/Litvishe/Sepahrdishe/Modernishe friend or Rav or sefer …