Because some people would rather just accept what theyre told based on doctrinal traditions of their denomination and are afraid to consider alternatives than what they are told. So anything outside what they are told, is "radical".
You clearly know my own personal faith story better than I do.
With my sarcasm out of the way.
I grew up in a very conservative Evangelical tradition. My family's church, until I was eight years old, was a non-denominational church, my education was, until I was 12, a school attached to an Independent Fundamentalist Baptist church. When I was eight, my family switched to the local Foursquare (International Church of the Foursquare Gospel, a Pentecostal denomination). I attended the Foursquare Church with my family until my mother passed and my father moved due to work, when I was 18 years old.
I began to take an interest in more serious biblical, theological, and historical study when I was about 17. This eventually led me to exposure to a larger spectrum of Christian views from across many denominations and traditions. And I began to have some of the ideas I grew up believing without question challenged, and I sought answers by more intensively reading the Bible, and working with both Hebrew and Greek interlinear texts and lexicons to help me better understand the original language of the texts. I took a strong interest in Patristics, the historic Creeds, and being concerned with not just coming up with whatever I wanted based on my personal opinion about what Scripture taught, but how it was read and understood historically.
Over a number of years this led me to many conversations with many Christians in many contexts and from many different backgrounds. But ultimately I found myself in the Lutheran tradition primarily because of the way Lutherans preached the Gospel in a radically Christ-centered and Grace-centered way that answered deep spiritual questions in my soul, both ones I was conscious of and many I wasn't conscious of.
I have continued in that process of questioning, searching, learning, and seeking to be informed and faithful to Jesus--even when and where it has meant butting heads with others. In my early years, I lost friends because of this. I faced ostracization. And even as some of those people who condemned me for questioning some ideas, all the while I remained devoutly Christian, have turned away and abandoned their Christian faith.
My singular drive, over the 25 years since this journey began, has been to be faithful to Jesus Christ.
So, with all due respect, you don't know me, or what I've been through.