I think people are talking too much about what they assume the motivations behind the change are; I really don't care about the motivations. What I care about is whether or not it is a good way to format pages. We could have a much more constructive discussion if people focused on that instead of making assumptions about the character of people who disagree with them.
I would like to point out that this is how the template is currently implemented. You can still specify the gender parameter on pages and have it show up, and if you do not specify the pronouns parameter it won't show up. If we just changed Template:Missing Pronouns so the string it fills the pronouns parameter with is null or whitespace (a very easy change), the pronouns cell would no longer show up on any page that has them unspecified.
There is an option on wiki pages where certain rows in infoboxes can simply not show up if not filled in. With that being said, we can keep the gender row open for characters that we DO know what their gender is (ex, Link, Zelda, Midna, etc.) while we leave the pronouns invisible until filled in for pages like the Kikwi's, Fi, or other characters.