Daycare costs in the Bay Area are absolutely criminal

Our daycare just raised rates to $2,400/month for our 18-month-old. TWENTY-FOUR HUNDRED. That's more than our mortgage payment. My salary after taxes and this daycare bill basically means I'm working for free, and I'm genuinely considering whether it makes sense for me to just stay home. Has anyone actually done the math where staying home was the better financial option? Or am I stuck in this system?