One person interrupts digital contact and others seek a precise meaning in the gesture. I propose to recognize that the block establishes an access limit, without necessarily telling the whole relationship.
In the example, looking for alternative accounts to overcome it violates that boundary. If there are practical issues to be resolved, an appropriate and respectful channel is needed.
Curiosity does not entitle one to a continuous explanation. A limit can be painful to accept and still remain a choice to be respected.