'Aviation travel is subject to delays'. It happens. Ryanair no more wished to disrupt the operation than the passengers did. People must accept disruptions happen. The fact a child was significantly disabled, though very unfortunate, really has no bearing on operations. I expect the other flights were full as this one was so delayed.
Have we reached such a stage in passenger expectations that any disruption becomes newsworthy? We already see that explanations are publicly demanded in the case of go-arounds, with every event loudly publicised in this forum. We expect public demands for reasons for delays, but isn't it going too far when the fallout from a disruption gets this sort of publicity? It cannot be helped.