It's a useful tool, yes, but it's also an incredibly dangerous one.
We really shouldn't be using religion to justify our values regardless, the best way is to use widespread secular education to so that the populace understands why the government acts as it does. To this end it really should be more of a priority for our Civ to prioritize gymnasium construction so that more of the people are educated and thus less likely to be swayed by religion over hard science.
Greater education also opens up the door to Democracy and more opportunities for innovation.
That's nice.
We'll look at it in 500 years or so. By then secularism should start to become a thing.
We will build Gyms, but they won't be competing with the priesthood for a very, very long time.
And the Priests aren't all bad. They are basically shouting at us to hold true to our values.
That can of course change, but we are not anywhere near that point. And to get secularism (or at least separation between church and state), we need it to be seen as a problem. So we should increase RA slowly and regularly get into arguments with the priesthood. We want more temples anyway. At least one in Blackriver, one in Hatvalley and one in the cataracts and later on somewhere in the middle of PTSD-chans territory. Thats ~4 RA, 5 if we add a level 2 temple in Sacred Forest. But it covers every major direction and is close enough together for the priests to stay in contact.
Greenshore and Tinriver will need temples as well at some point due to sheer distance, but it can wait.
For now, we should look towards minimizing the drift towards the Stallions Temple as AN noted it was starting to cause issues. Another temple in between should moderate the discussions by adding more viewpoints.