I'm not sure that even Rolfe goes as far as saying that gender recognition certificates should be ignored.I don't think those are the two, or only 2 positions. There seems to be a position that transwomen are not women and should not be treated as such doing the rounds too...and variations of it.
These are the 2 main positions and have the advantage of being internally consistent. More complex positions like saying self-identifying transwomen should have access to women's scholarships fall apart when the logic is questioned.
Spoken like someone with a penis.There's also the 'it doesn't matter what transwomen are anyway this is about penises and we all know penis means potential rapist!' position