Daycare costs are literally more than my mortgage

We live in Seattle and paying $2,100/month for my 2-year-old to go to daycare 3 days a week. THREE DAYS. My wife makes more so it made sense for me to cut back, but holy crap, at what point does it make more financial sense for one of us to just quit? We're not rich, we're normal middle-class people. How do other families afford this? Are we supposed to have trust funds or something? Thinking about looking into nanny shares but I've heard horror stories.