Too many claims..too little promise

WHAT DHONI CLAIMS:

1) BATTING IS OUR STRENGTH

2) WE ARE GOOD AGAINST SPIN

3) SPINNERS ARE OUR STRENGTH IN BOWLING DEPARTMENT

Analysis:
1) If batting is our strength then why are we going for a 7 batsmen theory (sometimes 8). Dont we have confidence in the likes of GHAMBIR,YUVI,ROHIT SHARMA,DHONI...Then why to have no.7 as a batsmen rather than going for a good pace bowler?

when dhoni has selected ravinder jadeja as the no.7 batsmen/bowler (i am suppose to call him an all-rounder which i won't because he is not even a decent cricketer) Why did he introduce jadeja in the 13th over after part-timers like suresh raina/y pathan...why dhoni sent him after bhajji in batting?

If dhoni din't have that much confidence then y did he select him in the first place???...
2) If we are good against spin then y are we losing wickets to unknown spinners like sulemann ben, chris gayle, steven smith...etc.why dont we develope skills to face good pace bowling rather than seamlessly claiming that we are good against spin???
3) IF SPINNERS ARE OUR STRENGTH IN BOWLING DEPARTMENT, then why HARBHAJAN has gone wicketless in this T20 world cup?..why does'nt he bowl an attacking line that can fetch him wickets?...or does he have the ability to take wickets on foreign soil?...
...too many questions unanswered...but still we claim ourselves the best team in world.