Yes, I’ve heard dozens of folks say that they are “spiritual” but not “religious.” When I asked them to explain the answer was usually along the lines of “I believe in something, just not the Christian faith and its God.
A friend and religious mentor of mine, who was a long time elder and lay preacher, said that he would asked them to define the concept of Christianity’s God and he said, I wouldn’t believe in that either. This was because their concept of God was so warped from what God is and what they though Jesus taught.
It’s possible that we could take the route of making Christianity more relevant to this generation. My concern has always be accurately portraying what is taught in scripture.
A faulty portrayal won’t get through.
But what if it gets accurately portrayed and still gets rejected? I wouldn’t support changing the message just to get followers.