I keep hearing this example, but it's hard for me to imagine how this works with companies that are not designing consumer-facing products. Will "getting input

I keep hearing this example, but it's hard for me to imagine how this works with companies that are not designing consumer-facing products. Will "getting input from lots of people with various backgrounds" make their servers not fail with 500 errors? Or make them actually deliver features at a reasonable rate? Or will it prevent them not having a major bug every other release? Because that's what the customers complain about, and that's what company needs for major growth. (I am suspect that hiring Rachel of rachelbythebay.com will help with this, but this will be because she is a great engineer, not because of her gender.)