Already it's normalized. No one is protesting in the streets about a cat aboard a plane.
Screeching infant, however? I'd vote to kennel.
Babies are humans and I think most people would agree they should be given preferential treatment over pets as such.
Airlines could do so much better with price discrimination than they do. Back three rows are dog rows, one dog per row. Pay double for the ticket. First airline to do it will make a killing. Have a behavior and temperament verification course if you like. Make the little guys wear a Hannibal lector mask if they’re big enough to be dangerous. The current system minimizes revenue, convenience for dog owners, and doesn’t preserve convenience for non-dog owners. It’s mind boggling.
People might have legitimate reasons on why they need to move their pets.
We leave them with friends, in boarding kennels and catteries.
Having your pet with you 24/7 is —for most people— an unnecessary kink, an expression that we've got too used to getting our own way.
It's not healthy. Get a grip.