Soapbox: Have We Solved the Problem of Boy Books and Girl Books?

I'd heard that before, always from those who live in large coastal cities. I can't say if those parts of our country have evolved beyond it, but I live in a flyover state, and that very same week, five women had come into my home office one by one to work on a non-publishing project. All were mothers who had at least one son and one daughter, and as copies of my books were in the room, I offered to sign some for their kids as a thank you. Every single one asked me to sign them to their daughter. When I learned their sons were also the target age of the books, I asked if I could sign one for them as well. It was almost comical how identical their reactions were. Uncomfortable. Confused. More than one even spoke those words: "But... it's a girl book."