Ah yes but you see Dave in sports all bar one of the worlds worst stadium disasters have involved football (the other one was ancient rome so im presuming wolf, shadow and lighting were in action)
Theres never been anything like that in a Rugby match so say 'can we stand at the rugger' and the authorities say no problem.
What the authorities apparently wont even consider is apart from ellis park in 2001 these disasters happened in very old or poorly maintained stadiums. The ellis park one coincidentaly is very similar to hillsborough in that too many fans were allowed in. Being an all seated stadium does fuck all when 120,000 people force their way into a 60000 capacity ground.
Personally I think the chances of standing returning to UK grounds will improve if the classified Hillsborough documents ever see the light of day.