If I had classified documents I was improperly storing I'd want to get it out there in the same news cycle as everyone else too.
I've got the same feelings about Pence's documents as I do about Biden's. I bet a thorough search of the homes and offices of just about any high ranking politician would turn up that sort of thing.
As someone who has zero practical experience with classified documents, is there a reason that Biden and Pence's attorneys aren't just wiping those documents, like with a cloth? I'm sure that reporting them is the legally correct thing to do, but unless there was traceability to the documents it seems like illegal destruction would be far cleaner, and if there is traceability then I'd expect the tracking authority to be following up with the parties as opposed to waiting for their attorneys to dig them up.