You can get a cat for who it is more beneficial to stay inside. For example cats who are scared and skittish or cats who are fiv positive. The former should stay inside for their own safety and the latter for other cats’ safety. And they too deserve a home :)
That’s just wishful thinking that doesn’t address the problem at all. Even though you might want the 90-9-1 ratio to change, it isn’t. It’s an established pattern for a reason. Even if the person you responded to was gonna post a lot, they might get a few upvotes, maybe a comment or two on their posts. Simply because there aren’t enough people here to engage with niche topics. And then it feels like your effort is futile (which honestly it is if your goal is an active community), they get discouraged and stop posting and we’re back to square one with no meaningful changes. Sometimes it is about numbers and this is one such case.