I don't see what that has to do with anything. I'm not saying dogs should be allowed to roam free while cats are kept inside. I'm saying they BOTH shouldn't be allowed to wander freely. Dogs being a danger to humans is just another reason why. I'm just listing some of the reasons why cats also shouldn't be allowed to free roam. Danger to humans isn't the only reason to keep an animal indoors or in an enclosure unless on a leash or supervised.

Dogs also become destructive when kept inside without being exercised or entertained. Dog owners are expected to provide those things instead of just letting their dogs roam loose around the neighbourhood to entertain themselves. Your cat isn't some super special exception among cats who never kills any native animals that aren't pests. You can cat-proof your yard to provide a safe outdoor space for her, or leash train her and take her on regular walks to drain her energy and satisfy her desire to roam, or make her an enclosure that she can stay in outside without being given complete unsupervised freedom, but of course those solutions would all take actual effort. So it's up to you to decide, would you rather put in the effort to provide an appropriate environment for your pet, including enrichment and training and exercise, like dog owners are expected to do? Or would you rather shrug and toss your cat outside to contend with cars, coyotes, and all manner of toxic plants and chemicals and diseases and parasites, and allow her to continue to contribute to the destruction of the local ecosystem?

Because it's not really about what makes your cat happy, that's just the easiest excuse to convince yourself that you don't have to change things. After all, if you did your due diligence she could be both happy and safe, and living her best life without having to be let outside unsupervised. What it's really about is whether you're willing to put in the work to make that happen as a responsible pet owner.