Yes I agree but that is totally different to looking for a belief system that promotes a way of life and world view that's satisfying even if untrue, as you stated I your OP.
I can absolutely see how what I wrote can be read in that way. I could be taken to be saying "even if what JWs teach is true it's not worth doing", or "even if what other religions teach is not true they may be worth joining anyway". But that is not what I am saying, and the difference is important. What I am saying is that the very concept of truth is problematic and needs to be gotten rid of in the conversation.
Imagine people intend to burn a woman to determine if she is a witch. I say to those people "don't do that, it's no way to treat someone, and besides it's no way to find out if she is a witch either". Early modern witch burners may be liable to misunderstand that objection as an admission that there is such a thing as a witch. They think I am just objecting to the method of discovery, rather than the concept, and the comment "no way to treat someone" they brush aside as irrelevant to determining the truth.
It's the same here. My main objection about evaluating religions on the basis of "truth" is that it is as flawed as evaluating a woman by burning her to see whether she is a witch. It's not just the methodology that is flawed, it is the whole idea. On top of that, the most important thing in the situation is how you treat the person/the practical results of pursuing a belief system. Concentration on concepts of witches and truth just badly misses the point!