That's how all modem stadia are built.
It's not like the steel was cast in situ at Commbank or the SFS for example.
The only difference I can see is in the construction of the footing and foundations.
And that's not exactly the major cost item anyway.
Exactly. As someone else stated, modular does not mean scaffolding type stands.
3 sides of CommBank were modular built.
In fact, CommBank is the almost perfect example of a modular built stadium in Australia. Only the corporate western side was built in-situ. The south, east and north sides were constructed off site and assembled on-site. That is what modular means. It also substantially reduces the costs.
Many football stadiums in England have been re-built this way substantially cheaper.
Middlesborough, Leicester, Derby, Sunderland, Coventry, Millwall etc.....
There are many other examples over there that typify how decent stadiums can be built cheaply.