California has no-fault laws to avoid the concept of fault in the marriage. This essentially lets people who don’t want to be together any longer get a divorce. No spouse in California can hold the other spouse in the marriage against their will.
All that the petitioner for divorce must say is that there are irreconcilable differences. This is grounds for divorce. While some people want to try to work things out, when the other side objects, the divorce can go through.