Perhaps because what they're related to does indeed show intent (the need) to hide the documents.
I'm curious, but this is probably what we'll get, if anything... 
You know how the game is played.
The other key difference: Trump was President with the authority to declassify. Biden was not. And Obama sounds like crickets at 2 am.
Lastly, there is a glaring lack of curiosity of what the documents in Biden's possession are related to.
I had duty in a SCIF when I was just an E-2 with a TS/SCI clearance.
I would have been charged, imprisoned, demoted, and then dishonorably discharged.
I would think a Vice President is held to a higher standard than I was…
Perhaps because what they're related to does indeed show intent (the need) to hide the documents.
I'm curious, but this is probably what we'll get, if anything...
You know how the game is played.