Ignoring the inherit assumption that religion is de facto an issue or backwards, and ignoring the fallacy that “progress” is co-liniar with the passage of time, logic is not in of itself a perfect humanistic process of thought, rather it has been developed by humans over the millennia.
There is great comfort in the process of growing into and exploring one’s faith. Growing up in a theologically liberal Christian church, I was invited to find ways to meld the kingdom of God and the kingdom of man is such a way that I find purpose and vocation within my life. Religion also offers a place for community among people committed to a mission, be it good or bad. These communities preserve and honor cultural traditions, again, the good and the bad. These are just a few reasons I think people are now, and will remain well into the future, religious.