I have been reading something that gives info about how various faiths answer to a question about the animals. The author makes a research and gives what some faiths say about the issue. And the text has the following sentence:
"Among other religions, mormons have a clear position, declaring that yes of course animals can go to heaven. Here’s what a few other faiths have to say about the issue..............
When I was reading, the use of "have to" has caught my attention. We know that it is a modal and is used like "must". And it requires some outside compulsion or obligation. So far so good.
However, in the above sentence, there seems to be no obligation or compulsion at all. The author simply shares what various faiths say and the faiths say various things just like a person shares his ideas. So there is not any forced or compulsive situaiton here, and no obligation either.
So, why is it "... Here is what other faiths have to say about the issue..." instead of "...Here is what other faiths say about the issue?"