Extreme hyperbole and simplification would be “women are only good for cooking so need saving constantly”.
It’s a common misperception to believe that the reason women are so often “imprisoned” in games is due to their perceived impotence.
After all, in traditional reality (“real life”) men are imprisoned at a far higher rate than women, so according to this logic men are perceived to be far weaker than women.
The primary reason women are usually the ones imprisoned in video games is that the usual gender of the hero main character is male, and there’s a heterosexual factor in the “saving”, as per the original myth of the noble (horny) knight saving the princess locked away in a high tower within a castle. The implication is that upon saving the damsel the damsel’s king father will be so full of gratitude and so impressed by the knight’s bravery and prowess that he encourages or perhaps even forces (heavily coerces) the princess to marry the knight. While an utterly sexist myth, note that the princess’s weakness here is not inherent but rather is caused by the political/social reality. The tower is a phallic symbol, the princess is imprisoned within the penis, and the knight merely moves her from one prison to another, one which he obviously prefers since it’s his own. Also note that the tower is within an enemy castle, so the king doesn’t so much care about his daughter but rather about his own loss of prestige of having his daughter captured by the enemy.
Rather than appreciate any of this and respond to it by boycotting said games, most gamers will happily engage in “save the princess” sexist games while simultaneously claiming to be at the very least friendly to feminism. A hypocrisy which is very rarely called out, so life gets to go on with no real thought, care, concern, or self-criticism given to it.