The effect is much the same: minmaxing players will avoid strength builds when making a woman hero. Of course, you need to talk with your group, as to avoid any lingering resentment over this.Might work, but I would not go with penalty/bonuses, rather with limit on maximum score at character creatiton or general max score.
It is best if everybody agrees female Schwarzeneggers have no place in campaigns based on classic Howardian literature, or settings based on mythic Greece/Scandinavia (etc). Traditional gender roles are not inherently harmful and should not be swept under the rug - not when the campaign is set specifically in times or locales where it is a fundamental assumption of the source literature and inspiration, imo.
I am merely making the observation that in my opinion more campaign authors should have the courage to spell this out, as opposed to leaving it unaddressed (and up to each play group).