Then by that definition evangelical Christians are not sects either.. as we all hold to salvation by Faith alone in Christ alone to the glory of God alone .
When I wrote of having the same beliefs I meant that Eastern Rite Catholics and Latin Rite Catholics believe in the teachings of the Church. This goes into a bit more detail than a very valid yet simple statement of faith.
Perhaps we have a different understanding of the word Sect. I am using it to mean the same as a denomination. Would you agree there are different beliefs between a Presbyterian and a Lutheran regarding some central matters of doctrine? For though both hold to Sola Fide they are not in agreement on the nature of Holy Communion or the question of double predestination. These are not minor points when the teachings of these two denominations are given closer examination.
For instance I and a Southern Baptist both believe that Christ died in atonement for our sins. We both believe that Christ is the second person of the Holy Trinity. True God and True man. But our respective beliefs on Baptism being a sacrament vs it being an ordinance are so in opposition I could never say I was a Baptist, nor could she say she was a Catholic. But I would agree fully that she is Christian.
Think of a sect or denomination being a subset of overall Christianity. We have many beliefs in common but we are separated by very real doctrinal disagreements. To just gloss over these and say they don’t matter is to me an insult to those who hold these beliefs.