Actually, I can understand this way of thinking.
My wife is a conservative Catholic who immigrated from a conservative country. Out of respect for me - her husband - and her marital status, she will not let herself be seen alone in a car with only herself and an unrelated man, nor will she go alone into an environment where there's male drinking.
I initially thought this was over-the-top, but after some discussion I came to see that's her way of showing respect for her marital status. It's not about the possibility of an attack or romantic encounter, but about the appropriateness of her being in a position that could indicate or appear to be an improper relationship.
Early in our marriage I was initially blown away by this, but came to see it as an amazing tribute to her taking our marriage and our marital appearances seriously. So I've not only accepted this, but have come to greatly appreciate her devotion to our marriage! I don't drink, so I'm not in bars much these days, but I've come around to conducting myself in a manner that also shows some similar respect for her. My politics may be liberal enough, but in my personal life I'm actually pretty conservative. She's influenced me even a bit more in that direction, but she's the real deal! And I love her for it! How can I not?