Why not both?
It's really hard to write female lead characters *in action movies* who are both relatable and have a satisfying character arc.
Yes, Ripley was great in the first two Alien movies, Sarah Connor was excellent as a scared waitress turned heavily armed survivalist lady in the first two Terminator films. These exceptions don't disprove the rule.
Why is it a rule? Because we're a sexually dimorphic species that
hates women doesn't generally like seeing the smaller, weaker and more biologically valuable half of our species put in danger.
The hero's journey is nearly always a male hero's journey, because the sort of heroism fantasy exists to mythologize is masculine.
Who goes downstairs with a flashlight when there's a bump in the night? It's probably not the wife, is it? Unless divorce is on the cards.
Who fantasizes about fighting dragons or space wizards or aliens or whatever to save/win attractive royalty of the opposite sex? Not so much girls, amirite?
It's hard to adapt the heroic protagonist template to women, because it's not really made for them. In real life, women are rarely *physically* heroic, for good biological reasons. If they were, we probably wouldn't have survived as a species.
(It's interesting that the most successful badass incarnations of both Ripley and Connor were motivated by maternal instinct - mama bear defending her cubs is a relatable and emotionally satisfying reason for feminine fierceness)
In recent years we've seen quite a lot of Whedonian wisecracking, buttkicking waifs. I don't mean to be unkind to male fans of Buffy or whatever, but they seem a little soy-y. It's a masturbatory fantasy with relatively narrow appeal - mainly to socially awkward nerds. Mila Jojovich has made about 58 Resident Evil movies and they seem quite successful, but that's a cultural niche.
Star Wars became a pop culture juggernaut because it used to tap into something much more mainstream and deeply rooted in the collective unconscious of normal human beings.
The young man who leaves his backwater village to seek his fortune and test his courage in a wider, more dangerous world is so ingrained in our historic experience as humans it might as well be encoded in our genetic memory. It's the story of every curious caveman who wanted to know what was beyond the mountains.
You can do a gender swap on that story if you like, just as you could flip the roles in a romance story and have a male lead pursued by two women. It's just a lot more difficult to do it well in a way that will satisfy a mass audience.