I also think it was confusing, but I think I understand what San K meant, at least I think so
. He probably meant that the photons get deflected when they pass the slits, due to interactions with the electrons in the plate material (at the edge of the slits) (San K, please correct me if I misinterpreted you).
There is however, AFAIK, no such interaction between a single photon and an electron (even though light can be influenced by e.g. magnetic fields; polarization rotation in the
Faraday effect).
Concerning discussions for/against wavefunctions, my standpoint is that the most simple model that works best is the best model, even if it might be counterintuitive.