Because replay sharing does not help you improve. It give away weaknesses in other people base to you. I used replay to look at how other people attack me. I then use this information to make changes to my base. These changes help me be stronger and more competitive player. War replay sharing give away the weaknesses in your base to the guy we are attacking. Information that would not be deamed important enough to convey by normal chat or clear enough from a snap shot. I watch a friend's atomic bases get 5* this last war. 1st time I have seen it done. He was attack by gpa and this guy did not go for any stars. Did not use a single tactic Just dropped a 100 foot soldiers. And summoned them to the middle of his map.they did not make the entire trip in, but in doing so he revealed that the easy path straight to the tc was not lined neck deep in traps like the bluff intended. He was then later attacked by another atomic and 5*. This atomic went right up mainstreet for the kill. Unless that atomic was incredible stupid or just did not care. Both I think unlikely. I watched both battles and could not figuer out why that gpa would attack somebody that way. Then the sec attack and two & two went together. Several other people were hit the same way. This is the new method of sandbagging. Attack with a lower age to reveal traps, troop donation, and any weaknesses in the base that can be exploited. I realize a bit long winded but hopefully that answer your question. If you had read earlier in the post above. I stated as such before.