I think that to state that the bridge designers as morons in perhaps a little unfair...
Take Brunelleschi's loggia to the foundling hospital, base units of 12 etc fantastically well ordered when you study it
Or take the abutments of the bridge for example- both dimensionally different to fit against the quay walls but cast off the same toroidal mould. Less visible maths behind it.
Then there is the truss that without the existance of Oil rig welding technology would not have been possible to fabricate!
All these parts made in Carlow, Banagher, London, Belfast, Cornwall and Dublin came together with a 2mm tolerence on site!
I am sure Brunelleschi, Alberti, Archimedes would have liked to have done that, and got it right first time!!