And what about Ripley? One of the most iconic and enduring female characters in cinema, almost unquestionably the most so in SF. Does Ripley speak loudly through being quiet and sensual? I don't think you can make any objectively persuasive claim of the kind you seem to be making.
Ripley in Alien is a perfect example of a strong lead female character, leagues above anything Kira and Seven can achieve combined.
She doesn't squark or throw tantrums to be heard. Your very own example proves my point.
It is just your relentless sentimental bias from watching DS9 and VOY that makes you fail to differentiate successful Hollywood movie characters to mediocre ones from TV shows that got cancelled.