I think it is a level playing field as 'The Sage' says. In any airline selection generally (I'm not talking directly about BA assessment here) all I was trying to say was if an experienced Captain doesn't demonstrate good leadership skills then they have already had ample opportunity as a Capt to develop those, so you can infer they are not likely to improve, and their potential is low. However an inexperienced candidate may not have much experience of direct leadership to draw on, but if they display the right qualities and personality that make a good leader, you can infer from that they have potential in that area.