I think that’s all part of the master plan. Because no-one knows what’s going on in his head, (possibly even Drummond himself), how can other teams plan to contain him, apart from constantly fouling & kicking him in the hope of slowing him down.
I think it could be his legs are so fast that the signals from his brain can’t get to the legs fast enough. I was not a fan at the start of the season but love watching him now, he does so much running & causes defences to panic with his speed, and some of his touches for other players are excellent.