His point is, using tiredness as an excuse when you can rotate players but choose not to, makes the excuse a joke and he's bang on.
Firstly Ox IS better than Gervinho, so why hasn't he been played more often, if we had tired players, why didn't he start today? Benny is on a big wage and has barely played at all, so why didn't he start. Coquelin has been around all season and afaik fit all season, so why rush him in at left back when someone is injured, he's actually looked very competent in all his performances, that is another player who could have come in for games to give Arteta/Song a break, Frimpong started games early season and really hadn't been seen.
The simple fact is that as always Arsenal have a BIG squad, loads of players, but Wenger refuses to rotate and in general this is a huge part of why Arsenal are always in an injury crisis(it is really hard to not spell that as crysis these days), play someone till they are injured, then put in someone who hasn't played a run of games in over a year and be shocked they don't instantly play well.
There is NO reason at all for Arsenal's squad to be tired, other teams rest players.
If we rotated properly all season long, we'd likely have far fewer injuries.
Hell, we'd have more players to rotate if we stopped throwing contracts at stupid players. There wasn't ever a reason to buy Chamakh, Gibbs and Diaby should have been released years ago, Rosicky as well. If we released a left back who can barely complete a single half before being injured, or Diaby who is both epically awful, incompetent and can't stay fit to save his life, that is two squad positions and two wages that could go on two players who actually can stay fit for more than 3 minutes a season, two more starters or two more players who can be used in rotation to help prevent injuries and tiredness to our first team.
If Diaby and Gibbs were rock solid and randomly got long term injuries there wouldn't be anything you could do about that, Wenger is entirely at fault for still relying on Diaby or Gibbs.