While a section of footballs fan base favours limited safe-standing what incentives are there for Clubs and government to agree?
The government of the day might benefit slightly from the goodwill of fans happy with a move to safe standing. However balanced against the risk of any injuries of fatalities that might occur as a result of the move that would blamed on the government you can see why successive administrations have declined to act. I believe this is a manageable risk but you could never prove that it would be zero risk (because nothing in life is).
From the clubs perspective an all seater stadium is easier to manage and- I would suggest- more likely to create an experience favoured by the families which Clubs prefer to attract. Standing crowds would require more Stewards and alterations to Stadia. If say Y26 were to be converted to terracing then both the concourse and the areas in the stadium would have to be sectioned off to stop fans from the seated area moving there and causing over-crowding. It would also encourage away fans to stands and perhaps require similar alterations to the South Stand.
So in summary safe standing is favoured by a small group of primarily younger men as it would increase their enjoyment of the game. Now as this group is probably still going to come to games anyway and the risk/cost considerations are never going to sway the authorities it’s simply not going to happen. Sorry.