It’s not questionable at all, though. This operation has been a resounding success. Ukraine gained hundreds of POWs that can be used to exchange for their own people, they’re digging in and holding land and resources that can later be used during negotiations, and they’ve proven not just once but twice they are capable of sudden surprise attacks that can puncture Russian lines and take huge amounts of territory in a single sweep. That last fact alone will force Russia to recalculate their placements along the front line and move more troops to reinforce perceived weak points, taking focus away from elsewhere.