Lack of sarcastic smiley makes me think you took him seriously.
I probably row more then, or at least the same amount as you3-4 variants per week
I've actually been rowing on back days, along with another day thrown in

Have you tested to see whether you can do the prescribed bench weight pain free?
My suggestion is to do AGVT and substitute exercises where necessary. It really won't be that detrimental to the programme, provided you don't end up doing curls for a back workout.
My tested 1RM on bench is 67.5kg, however 75% of that is apparently 50kg, which I won't be able to do without snapping - 40kg yesterday felt dire; but not heavy.
Basically I would need to do the following (left: what I would do, right: what I can't do)
DB bench : BB bench
DB OHP : BB OHP
Rowing as you've said, I'll probably have to resort to some machine/cable rowing and Db rows
I may have a go at 1RM's for squats and deadlifts next week and play around with my 10rm's for DB bench and DB press, I don't think doing bench press is a good idea at the moment.