I am an out and about daycare provider too. I feel children learn so much from the world around them. I do lots of field trips. The children have the rest of their lives to be in the same four walls day in and day out (school) and they learn so much at such a young age so why not show them the world around them.
However I know some parents that go to specific daycare providers that stay home as they feel that is more safe. But that's not me. It's really a personal choice of the parent I think.