Bear in mind that the reduction in train numbers reduces the ability of passengers to usefully travel. If you looked at the photo, all you'll have seen is a picture that's typical of a rush hour where, normally, far more trains would be in the system. Under normal travel conditions, and normal numbers travelling, the rush hour would itself ensure that distancing was impossible. The point is that since far fewer people ARE travelling, putting more trains on, WOULD allow for distancing, where in normal times, it wouldn't.