Flying in fog

I was on a flight the other day that started with standard pilot chitchat about the weather, but ended with: "Visibility in Portland right now is just a quarter-mile. But the crew is certified to land in those conditions. So sit back, relax, and enjoy the flight." That didn't make the flight more relaxing for me.

Mt. Hood above low fog
I guess what I wanted to hear is that they land in those conditions all the time—not that at some point in the past they passed a test in landing in those conditions. The fog was bad when we got to Portland, but the landing was great. Thanks certification!