its a belief that religion is a net negative for society.

Ok but you are ascribing this to my making of an assumption, which I am not.

I have mentioned myself that religious indoctrination of course still exists

And yet you asked for evidence and method, for which there is an awful lot. Which leads me to -

There is no instance of a society without religion

We aren’t talking about whole societies, just individuals. This can be studied very effectively.

There can be no consensus on what is beneficial and what isn’t, as morality itself isn’t objective.

We aren’t talking about consensus, again it’s only individuals, which can be effectively studied.

These benefits are those claimed by the religious themselves, not whole societies.

You would have to so create a set of all the benefits religious people claim to get, which in and of itself would be a monumental task.

As I’ve said, we’ve been doing this for a long time and have vast data from many people. Social activity and personal motivation are well studied and include the religious.

Then, you would have to demonstrate that nonreligious people can achieve all of the exact same benefits.

Again, this is well studied with mountains of good evidence. It’s what I meant when I said I’m surprised you’re not aware of it.

You’re welcome to your view, but I disagree. Don’t feel you need to continue, but I’m happy to if you want.