Sachin needs rest again ?

I just happened to look at the recent ODI team chosen for the Ind- NZ series and once again Sachin Tendulkar is being "rested". This is the nth time he is being rested from a one-day series and I dont seem to fathom the reasoning behind this ! Is he injured? No he is not - he still runs like a hare between wickets and as of yesterday he even saved boundaries (quite an achievement given the standards our athletes set on the field with balls going right through our dives!). Test Match cricket is well spaced out and you are not overworking yourself day in and day out -so there is no reason for him to feel fatigued !
This whole "rest" concept is killing the enthusiasm me as a cricket lover would have before the start of a ODI series. Also, with the amount of cricket that is being played,its also starting to show on the players. Dhoni would be saying "Oh No ! yet another ODI series to play" whenever he would look at the ODI calendar.Once the players start losing interest in playing for the country, how would viewers be able to keep their interest captivated? Interestingly, none of the Sachins, Dhonis ever seemed to be fatigued or tired while showing up for the IPL which involved much more intensity and was heavily demanding on the body. For the records, Sachin was the leading run scorer in the last IPL - a certificate of his fitness and his purple patch in cricket. Some would say that he just wants to maintain his ODI average after a 200*, others would say he is just not motivated enough to play ODIs other than the world cup.
For me, I dont mind him resting if he is doing it for a bigger reason- that is to play the World Cup. And the final icing on the cake would be if Sachin would see India home in the finals next year to lift the World Cup ! Till then let him rest!