There have been two male winners: Edd Kimber and John Whaite.
I’ve just checked, and there have only been two all-female finals to date. Season 2 with Joanne, Holly, and Mary-Anne, and Season 4 with Frances, Kimberley, and Ruby. I remember there being some criticism around the latter, but IIRC it was due to Paul’s perceived favouritism of Ruby.
I think it’s fair enough if Rahul’s excellent track record saved him this time but I wish they had been more transparent about it. They attempt to create suspense by emphasising that anyone can go on a bad week (it was their justification for eliminating Liam last year) but that patently wasn’t the case here. By their own rule, serving something inedible in the quarter-final should send a baker home.