What's misleading? Boeing procedures prohibit aborting a landing after t/r deployment. But we design the system so if they do, they won't crash because of the reverser system (no guarantee that they won't still hit the obstacle). Cranbrook crashed because the aircraft became airborne before the thrust reversers were fully stowed, and one re-deployed - had the reverser not re-deployed, they wouldn't have crashed and 41 people wouldn't have died.. We don't want that to happen again so we design the t/r to fully stow even if the aircraft becomes airborne again before the reverser is fully stowed.
Yes, it is an unapproved, dangerous maneuver. So is running into a snowplow or another aircraft at 100 knots.