So you do have an interest in it.
You may not have a paticular interest in the detail of religion directly, however you do have an interest indirectly.
I am the same with politics, politics bores me, but I hold an interest because it effects me indirectly.
You've missed the point entirely.
You say I have an interest in religion because I talk about it with people, I say I don't because, frankly I don't.
I have an interest in how religion affects my life, none at all about actual religion. Different things. As I said, you definite "interest in a subject" differently.
