They do not all get along fine and I know this b/c they have buildings which separate each other during worship, they have creed books which do not harmonize with each other. (1Cor.1:10) (Phil. 3:16-19)
The Church established by Christ is in the Bible ecclesia, and it denotes God's people throughout time, both old testament and new.
The church in the Bible is not only us who are alive today, but those already passed from this life...
However, that doesn't stop us having church buildings or local congregations, as we see in Acts of the Apostles 11:19-26 the mention of the church in Antioch.
Revelations mentions the 7 local church congregations back in that time, all of which had particular challenges to overcome.
There is a universal church that spans time and space, of which all believers are a member of, and then there are local congregations. Sometimes those local congregations have challenges they need to overcome, but of which God's people also belong.
Part of being the body of Christ means also to be part of a local body as well, where we may carry out things like baptism, like the Lord's Supper, like the encouragement and edifying of believers as we ourselves are being edifyed and encouraged.
So there are two things when speaking of the Church, not one. One is universal across time and space, and one is local.
Local is more likely to have a place to congregate in than not, but it's not in order to "divide", it's in order to congregate regardless of weather while carrying out the particular edicts of our faith in the physical.
A particular challenge of our faith is that the wheat and the tares will grow together until the harvest, which is most clearly seen in local congregations, but even still, doesn't stop or prevent Christ's Church from being just that, His Church.