This only works if the merge is being done to staging builds that are continuously tested by a QA team before they go to production, with carefully planned production milestone releases. I work for an emergency management SaaS company. If we just merged all lightly reviewed code into production without thorough QA testing, there’s the possibility that our software would fail in production. This could cause aircraft in major airports to crash into each other on the runway, or a university to respond poorly to a live shooter situation, or the deletion of customer data about COVID vaccine efforts, etc