you save a thousand a month

I could hire Gordon Ramsay to cook for me, while a pornstar dresses up as a waitress to bring it to me, and I'd still save money over a divorce.

You save in the short term if you're lucky, and lose heavily in the medium to long term. Your losses are effectively limitless, as courts can order a cut of your future wages to go to your ex easily, on top of the settlement.