They don't show enough evidence to make subjective determinations. They really don't know if the prints are indeed made by women or simply younger smaller members of the male population.
Personally based of of known human behaviors over time not being so mutable when examined as a whole I would submit that both sexes did do some painting. If the painting's are done in easily accessible areas (such as the kind one see's evidence of long term habitation within) then its quite likely it was the women who did most of it. If however it was found deep into hard to reach places...it may be a spurious correlation to make that it was only one of the sexes involved.
Same with the hunting injuries...which could just as well be from war or simply and more likely (if possessed by both sexes equally across the board) from the rigors of survival in hostile terrain.
I would also postulate that the amount of child care being provided by the fathers was about the same as is seen in other known social structures of human hunter gatherer societies. (Same goes for the division of labor among the sexes) which hasn't really changed all that much until the advent of technologies that allowed for deviation from the biologically imparted norms provided in evolution for us as a species.
So in all...I submit that their abandoning scientific objectivity by providing preconceived subjective opinion to their findings.