Perhaps people on Christian sites, are better quality people, than found on other sites?
You can meet bizarre people in real life, as can happen on dating sites. Use your best judgement however you have met someone. Regardless of how you meet someone, you need to take time to get to know them over a series of dates and spending time together, to learn if you are a good match.
Yeah, you can have posers on any website. I met my wife at a college dance hall. Amarillo By Morning, I believe it was.
Met my first wife on a Christian site. She was a malignant narcissist.
Faith-based sites in general are better (I'm Jewish) because they work within a specific demographic. It is important to share the same goals, values & lifestyle.