I agree it is dishonest to preach that the Earth is 6,000 years old, that evolution is a lie, etc. But it's certainly not dishonest to preach that God created the universe, or that the Gospels are true, etc. That doesn't contradict science.
It's dishonest to say God created the universe, and the Gospels are true, and the only way to Heaven is by accepting Jesus, and you need to give us a percentage of your monthly income. Because that's usually the progression. They start by giving you their version of history, then how you should live your life, then they keep you in their pews mostly through guilt and by coercing you to give them money so you feel invested in it.
Church's are to the spiritual as hospitals are to the physical. If you have no desire to recieve physical healing, you'd be in such a mindset regarding hospitals that you could make the same argument you just made against hospitals. If you have no desire to receive spiritual healing, there's nothing beneficial for you in a church.
"Spiritual healing" could come via a nice hike in the mountains and watching the sunset, or meeting a gorgeous woman, talking for hours and making love that very night. Maybe for some it comes in a church. But there are also lots of people in church out of guilt and obligation, who don't even question what is being taught there. They're accepting whatever the preacher says. Many of those people, I would argue, experience the opposite of spiritual healing. They're more like drones or slaves.
I made no insinuation that churches have cornered the market on spiritual healing. Nor have hospitals cornered the market on physical healing.
A fortune teller is a "spiritual healer". If the fortune teller honestly believes they are telling the person's fortune, I don't think it's dishonest. If they know they aren't, and are doing it just for the money, then it's dishonest.
That being said, I think there are some "church" type organizations out there that don't really believe what they are saying, but are doing it for the money. In my opinion it's a small fraction of churches though, as I believe most churches really do believe what they are saying. But there's no way to really know what the percentage of the two is that make up all churches. Your guses is as good as mine.
And I don't argue with the claim that there are "drones or slaves" in churches. Again, we'd probably disagree as to the percentage of the church members that make up the church, but I can't say they don't exist. They are freaky to me, and I've been going to church for 30+ years.