Says it is for right handers only
Or the control knob is on the inside and hard to get at - buuuut...
Can't it just be worn upside down and the button and control knob would be the other way up. A magnetic clasp would work both ways (wouldn't trust that on a sports watch myself).
Can't see it as a serious issue, it is 1/7 of the general population pissed off or twisting their arm horribly otherwise.