The fact is so many clubs have lost people, while few have lost so many in one incident, there have been teams lost, fans lost, groups of fans lost and some truly massive tragedys outside of football that completely dwarf the losses at Hillsborough. No one is saying forget or ignore it, just that, the rest of the world gets on with life, its always come across as somewhat odd that HIllsborough gets treated as a worse tragedy and more important than anything else.
Someone mentioned for instance Gerrard would have a hard time playing on the anniversary as he lost his cousin, but how many players play games every year on an anniversary they lost someone incredibly close to them? Everyone has lost people close to them, and don't get days off.
There is being sensitive and, somehow giving preferential treatment over an incident that, no other club, no other tragedy receives.