No still less accurate, since mine is not guess.
Young forwards are in general more versatile and adaptable (and less senior in the pecking order) hence they get shifted about. That's no news. Rashford has played all over the place before settling more as a LW. But as Sancho coaches have said, he's more comfortable and dangerous on the left and cutting inside, because he's a right footer. Even in games where he nominally plays on the right he will often find himself on the left and create his best chances from there. Like when he played for England on the right, in the last friendly before the euros, and yet he his two best chances (including hitting the bar) were him coming from the left. If you watch his Dortmund highlights 80% of them are from left or centre, not the right.
I don't know where Ole plans to play him, but there's no doubt he's more effective from the left and the notion that we're getting a RW and selling a FW/LW (which is what I was responding to) is fundamentally flawed. We're getting a winger that can play both sides alright, but one that is more efficient on the left.