Usually, when we are looking for the responsible person, we don’t do it because we want to thank them. Questions about responsibility more often than not have a negative connotation.
When someone gets hurt and we ask who is responsible, really, we look for somebody to blame and possibly punish. There might also arise the question of compensation.
Considering that we can usually retrace and analyse most events with sufficient certainty as to who has done what, it could appear odd how there could ever emerge a gap concerning responsibility.