Some argue a thing is right religiously if it is “working” or “growing.” Their measure is by accounting, not accountability to God’s word.
For instance, if a local church grows from 75 members to 300 in a couple of years, it is deemed “God is working” and it must be right. Or if a denominational body is successful at adding folks or congregations to their roll, then it must be the Holy Spirit moving among them.
If numbers are a sign of God’s approval, then does He endorse Islam, Buddhism, or Hinduism? The latter two have about 1 billion adherents, the former is estimated to have 1.6 billion. This does not make them right, just popular.