I don't disagree with your last sentence. Personally, I wouldn't proselytize as I believe there is a reason for anyone to be born in a family following a particular faith. I think though I have the right to change that, I shouldn't (and wouldn't) but to each his own.
However, I still think his friends should not worry about his choice. Yuvan is a senior composer and knows what he is doing. He has made a conscious decision and if he thinks it is good for him, no one need to worry about it.