Because there's a crowd roaring them on? It's not like America you know -- people actually come out in the wind and driving rain to watch this. When you see eleven men fail to take advantage of the extra man it's usually because, contrary to everything you say, it's not in the script. Most managers and players buttume they'll be playing 11 men for the full 90, and I can't imagine any manager *ever* preparing his side for the possibility of playing against ten men, especially if he doesn't know whether it'll be a defender, midfielder or striker sent off. You'll often find that 11 men are at a disadvantage because they don't know how to take advantage of the situation, and that's why you get these results.
Yes, I was very disappointed to see Lehman go, because it would have been a completely different game had he stayed, and he almost certainly wouldn't have been caught out the way Almunia was for the goals. But Almunia would have conceded those goals even if Arsenal were allowed to bring on a sub. The goals were down to basic goalkeeping errors, which he would have made even if Arsenal had twenty men on the pitch. For your argument to apply you would have to replace the player sent off with a player of equal quality, and if he was of equal quality then he wouldn't be on the bench in the first place.
As for the World Cup final, well how much more violent can you get forfuxake? The spectacle was ruined by Zidane's moment of madness, not by the rules of the game which saw him justifiably sent off and his side disadvantaged as a result. Get over it for God's sake! Zidane could have end wotsisname with a head butt to the sternum like that! Anyway, Italy won on penalties, simply because France missed one, **by hitting the bar.** Would you care to explain how Global Organised Crime arranged it so that the outcome of this game was thus sealed in their favour? Did they bring Trezeguet or whoever it was that hit the bar on a five week training course to Algeria to get him to make sure he would hit the bar every time? Did they tell him in advance it would go to penalties, and that Italy would score all of theirs? Did they tell him Zidane would take a cheeky penalty in the first half which would definitely cross the line after coming down off the crossbar?? Fuxake man -- your argument is pathetic. Too many variables that nobody, even with their best endeavours and the backing of the Mafia itself, could foresee.
Do they really? And deflections too? Who came up with this theory then -- Archimedes was it?