"No spontaneously reborn beings"
A view is when you affirm a certain thinking to be true. Simply having a thought of doubt doesn't qualify as having a view, even though it's still unwholesome. 

A human taking the view that there are no spontaneous beings solely based on his inability to see them points to a flaw in his thinking. I.e. thinking that anything that cannot be seen does not exit. If a born blind person has the same thinking, he might even deny the existence of the sun and the moon. This is similar to taking the view that the earth is the only place with sentient beings in the whole universe because we haven't seen any aliens yet. The same line of thinking can make a person take the view that Nibbana does not exist, because he hasn't seen it.

Not believing in father and mother is more about thinking that there's no use in caring for them, which is wrong and detrimental. It's about biological parents.