But yesterday the penny dropped!
And Blatter has declared goal-line technology "a necessity" after Ukraine became the latest victims of its absence from the game.
The Euro 2012 co-hosts were denied an equaliser in Tuesday's decisive 1-0 Group D loss in Donetsk when officials failed to spot Marko Devic's shot had crossed the line.
Tuesday night's referee, assistant referee and his staff all failed to spot Devic's shot had narrowly crossed the line before John Terry's acrobatic clearance prevented it hitting the back of the net.
Blatter posted on Twitter: "After last night's match GLT is no longer an alternative but a necessity."