Agents, help me understand why no interior pics

[Joe M.]

Hopefully someone could help me understand why some listings on sites such as Zillow do not have interior pictures. 

For example, just looked at a listing with an experienced agent. There are 18 exterior pics and 0 interior.  The house looks immaculate with incredible landscaping.  The listing looks like a regular sale and not a foreclosure or anything. 

Only reason I can think of is the interior is trashed.  From a potential buyer, this is rather annoying. 

I can't think of any pros to do this.