Agriculture in general creates net positive utility for humans but there’s a rough equivalency for that benefit between animal and non-animal ag (actually worse for our health to eat the animal products) while it creates huge negatives for the animals involved. The equation of people consuming animal ag products to proof that it “creates utility” strikes me as the same fallacy as saying smoking cigarettes has “utility” - I’d argue it’s an irrational behavior (in terms of selfish benefit alone) that prioritizes very short-term enjoyment over long-term enjoyment.
I don’t know where you’re getting the idea animals are living “better than humans”, this is divorced from reality. Industrial animal agriculture is just that, an industrial process, animals in miserable conditions for their short lives to promote the bottom line of the company in question. Propagandized takes depict cows roaming around lush green hills and such, but essentially anything appearing in a supermarket had absolutely nothing to do with this.
On top of that there’s the actual reality of the incredible resource (read: water, fossil fuels) usage associated with animal agriculture because it’s inherently wasteful at scale, which is a contributing factor to our destruction of the environment sustaining our existence.