[cabmandone]

I'm left handed and never paid any attention to the side the blade is on and use the saws I own with either hand. I think you might be over thinking this one.
As to why the blade is on one side or the other I'd have to say for left or right hand use but again I have used a lot of saws with either hand and it didn't make me any difference. If you look at the fence there are normally two lines, one indicates the outside edge of the blade and the other the inside edge. Just align the line with the side your cutting with and you can use it with either hand.