Well, no, because in meatspace you have a more limited social circle. Few people would lend a physical book to a complete stranger, or if they did, would know they'd probably never get it back. Plus of course time is a limitation, and if a borrower is not local, there's the time of transit back and forth, which doesn't exist for an e-book.
And as a practical matter, it is pretty unlikely that you'd be able to find a borrower for every one of your physical books. But that would be possible with e-books, given a way to lend them to strangers, because of the way the site can match borrowers to lenders.