You are correct. “ United Church of Christ... The 60-year-old denomination...” is very un-Biblical. I had a superior at work one year who belonged to United Church of Christ and he just wanted to dominate every religious conversation. I learned the UCC is infiltrated by thieves like the Russian Orthodox. How to remove the thieves? Return to the sources in the Bible.
Read an analysis on FR years ago that endowments and wealth held by many of these denominations are large, and leadership appears to be incentivised to not grow their churches since the endowments would mean more per capita for the dwindling numbers of members who remain.