It is much easier to not claim affiliation with any visible or historic Church. One can be their own Church with no history other than the pieces of others they wish to; and, in effect, be the Church of Those Who Never Did Anything Wrong.
Combine that with being your own authority for interpretation and theology and óila!: The Church That Is Never Wrong *and* Never Did Anything Wrong.
Impossible in fact but, very handy in debate.
The New Testament gathering of Christians was called the ekklesia. It had no "denominational" label. It has been consistent since the time of Christ. The Nicolaitan attitude of the Catholic Church which corrupted the entire concept. The ekklesia of Christ still has no denominational label and never will.