Yes the article mentions mythology but it also says real examples like female samurais who were trained in archery and the Viking tomb of a female warrior who was buried with arrows
https://en.wikipedia.org/wiki/Birka_female_Viking_warrior
The presence of grave goods does not necessarily indicate anything about the person they're interred with. All that can actually be said with certainty is that weapons were found in a woman's grave. That they're calling her a warrior is conjecture.
Regardless, the draw weight is not something that could ever be known considering all that remains of it is a rotted bit of the stave, moreover since this grave is from the dark ages, armor would not have been commonplace in Scandinavia and Northwestern Europe. Under that condition, lesser draw weights would suffice to kill a man, so it would be more plausible that she could have used the weapon in warfare. However, this is not the level of technology that is typically portrayed in high-fantasy RPGs, which is 14th-16th century.