Any time you change from one thing to another you may call it converting. One could convert from Baptist to Lutheran, or Methodist to Church of Christ, or certainly from any of those to Catholic. The word is simply semantics and indicates a movement from one area of beliefs to another.
Certainly, it is judgmental and perhaps a bit unkind to declare that any denomination is not Christian. While we hold that the Catholic Church is the true Church founded by Christ Himself, and that any church who declares that they are the actual true church was wrong headed in its inception, many Christians alive today are members of their respective denominations by birth and know no better. Many others have chosen a non-Catholic church because they have unknowingly been misled. These people are very often Faithful, holy people who believe in all their hearts that they are Christians, saved by Christ on the cross because that is what they have been taught.
Because of that, we as members of Christ’s true Church must take the high road, not condemning but loving and informing our non-Catholic neighbors of the ACTUAL way, truth and Light.
As for the semantics, I will proudly declare that I was converted to Catholicism, having spent 35 years with my Cradle Catholic wife resisting the Church because I was not welcome at communion. In 2009 when I finally understood the truth about communion and the need to be pure and repentant in order to receive, I relented and was confirmed at Easter Vigil in 2010.
Whether you call it a journey, a choice, a movement, or a conversion, is of little consequence. In this case it is not the journey that is important, but the destination, which begins a new glorious journey.
In case you are interested,
this is my journey.