Changes to groove rules and equipment changes are hardly the issue, and every golfer has to play with those changes, not just Tiger. I've also read about tests against these groove changes, and though measurably, it seems to have little overall impact on professional golfers.
The scandal and subsequent divorce has mentally affected Tiger Woods, and his recent injuries, whatever their cause, have compounded his downfall. As one who has demonstrated remarkable mental strength in the past, clearly his mental and physical abilities are out of synch. The game of golf is littered with numerous examples, but none have been as dramatic as Tiger Woods.
Well if you talk about scramblig percentage, the statistics back you up. So far in the 2011 PGA Tour season, the scrambling average is 57.46%. In 2009, the last year the pros played aggressive-grooves, scrambling was virtually the same at 57.52%. So with short shots, the statistics show the difference is not so great.
But the statistics do not talk about who benefits and who does not. The is no doubt that longer shots from poor lies or even shorter shots wet grass is a different story. Even on short grass the new grooves change the ball flight - it launches higher. So you are going to see a resurgance of blades as opposed to cavity backs.
So even though the rules apply equally to all, they favor some players over others. The new grooves favor driving accuracy (not Woods) and players that have the finesse to better control launches (not Woods). These players tend not to be brutes (Like Woods), who can use a larger sweet spot and sharper grooves to rip shots from anywhere with spin and accuracy.
I don't like golf being a game where brutes get the rewards. I prefer to reward finesse and intelligence.