Why not? Especially when the technology didn't exist at the time to understand the why's. Now we are finally getting there with genetic manipulation. Of course, when scientists show that changing genes from A->B results in significant morphological changes, the creationists just scream ID, which is extremely specious on their part, don't you think?
Well it makes sense. I mean, if intelligent beings manipulate the gene pool, how is intelligence going to be eliminated from the process and result? Has science yet predicted morphological changes between species and watched it happen without guidance?