Why does a wicketkeeper change his position after every over in cricket?

The wicketkeeper changes his position after every over because the bowling and the batting ends are switched after every six balls. The act of switching the ends is done to keep the game fair. In addition, it also aims to minimize any advantage that players might get due to the following extraneous factors:

• Ground Dimensions-Certain boundaries of ground may be shorter or longer than the rest.

• Wind Direction-Wind blowing even in a slightly intense pace can help both; the batsman as well as the bowler.

• The Condition of the Pitch − Usually an innings of an ODI match consists of 50 overs, T20-20 overs, now if all the 50 or 20 overs are bowled to only one end, will not it damage that end? Eventually, the ruptured pitch will have uneven bounce or turn which proves to be vital for a particular side.