Rowing is a women's only sport... lemme think about that....
Tell that to the Armed forces who each have a rowing team. Jesus, even the SAS rows. Every university in Britain has rowing teams, male and female.
If you're implying it's less than tough, I think you'll find rowing is one of the most intensive sports around - it's all about power endurance and technique. The whole crew getting the power down for the length of the race as efficiently as possible.
I've played alot of sports. Football, rugby - and I've never been as knackered at the end of an event as I was after a full race. Nevermind, having to do it 3-4 times in an afternoon. It isn't a sport for weaklings.