Ma'am.
My son went into a 30 day inpatient rehab facility on 2/26/2019. I am so grateful he chose to go on his own. I've been sober 21 years, but did not go to an inpatient facility. I walked in an AA meeting one day and I still attend meetings. When my son gets out, it's my job to support and encourage him in his sobriety.
I've never heard a meeting labeled as "a sermon." I'm glad meetings are not "sermons" or I never would have gone back. Meetings are a safe place for alcoholics and drug addicted individuals to share their experience, strength, and hope with one another.
I doubt there's a perfect rehabilitation facility. Treatment centers save thousands of lives every year, and I'm grateful those people were there when my son needed them.