I read with interest the views on this topic and would just like to share my thoughts. I note that the subject is on alumni but i’m just writing on phase 2A in general.
Whether we were lucky that our parents sent us to an existing popular or non popular school, we did spend 6 years of our childhood in our primary school, benefitting, participating and contributing. I said contributing as I believe a school does not become what it is (good or bad) without its students. In addition, there is the heritage and spirit that have been cultivated and felt strongly about. To me, these 6 years spent means more, for example, than the PV hours clocked before P1 registration or religious affiliation. Perhaps that is why the policy is such that old boys/girls are in category A of phase 2. An uncap (subject to total vacancies) phase 2A supports this distinction. An old boy/girl remains an old boy/girl regardless of where they stay. I hesitate to judge which old boy/girl is more worthy or deserving of a priority than another, but a distinction can be made between someone who joined the alumni and someone who don’t.
Or perhaps the policy thinking could be because of the historical set up of the schools as someone has suggested.
As the policy is set, it then boils down to personal choices assuming parents are sensible on what is best for their child. This is not a policy matter. The consequences of the choices and resulting ground sentiments provide feedback to review or fine tune the policy. This does not necessarily mean the policy thinking is "wrong" as no permutation can please everyone.
It is true that not everyone has an existing alma mater. There is indeed the distinction of having another choice versus none. However, it is what it is, and given that the school ceased to exist, the consideration for giving old boys/girls priority ceased to be relevant too. Given that most schools were merged or closed due to low enrollment, perhaps the impact is immaterial going by the preference for "popular" school view, which I support. If the schools still exist, it is highly likely that they are not favored by the old boys/girls in any case.