A little mean to call them stupid. I think you should just read up more about BPs to understand why they do what they do.
BPs generally prefer smaller hides because they like the safer feeling of being able to squish in there without room to sneak up on them. Not every snake will... But a majority of them can be this way. Most likely a throwback to how they evolved living around termite mounds to hunt rodents.
I would try adding some moss or crumpled paper to the bigger hides. That way they feel more snug and enveloping.
I agree with what was mentioned above as well. You can try changing the placement to see if it's a location or a object preference.