Romans 14 is telling us how to treat others. How we treat our own stewardship is another thing. This is the talent that God gave to each until He returns for His own and expects an accounting from us:All I can say - which you don't seem to see - is that many Christians do indeed see it as a Godward, God glorifying act to receive a faith design that will likely result in many opportunities for testimony. Seem within the framework of Christian liberty as per Romans 14, this would indeed make sense to many Christians.
"So then every one of us shall give account of himself to God." Rom 14:12
That is may seem good to them still leaves the question of me for me or of you for you. As I have said Romans 14 is not granting us liberty. It is explaining how we are treat other people. We are not their judges. Whether or not we are our own judges is another question altogether. What we do with what we have been given is the basis for our final judgment. Part of what we have been given is this body, but it is NOT ours.