Do we need a visible church group to share with? Yes, we do.
But that will always run into complications for us which test our faith in God.
That is why our faith is not supposed to be in the visible gathering but in the invisible (spiritual) church of the firstborn above: Read Hebrews 12:14-29 and compare;
Hebrews 11:1 "Now faith is the substance of things hoped for, the evidence of things not seen."
2 Corinthians 4:18 "While we look not at the things which are seen, but at the things which are not seen: for the things which are seen are temporal; but the things which are not seen are eternal."
Romans 8:24 "For we are saved by hope: but hope that is seen is not hope: for what a man seeth, why doth he yet hope for?"
1 Corinthians 2:9 "But as it is written, Eye hath not seen, nor ear heard, neither have entered into the heart of man, the things which God hath prepared for them that love him."
2 Corinthians 5:7 (For we walk by faith, not by sight: )
The flesh of man has since Adam's fall into sin been controlled largely of what Paul speaks of as the carnal mind. You see that flesh does not think for itself to be able to choose to do this or that. The flesh is a sensual organism as is necessary so that it can communicate it's needs for survival to man's mind.
Sin only indirectly affects our flesh body for the flesh would have no power to do on it's own but for a man's mind choosing it for the flesh body. A man's mind is meant of God to control and regulate the needs of a man's fleshly body so that the body does not develop undesirable addictions and begin to sense it needs drugs or excesses of food, perverted sexual pleasures, and on an on to make it feel good.
When the mind chooses to allow a man to smoke cigarettes it is not long before a man's body becomes addicted to cigarettes and then, when the man tries to go without cigarettes, the body senses the withdrawal from the ill-formed habit and communicates that feeling to the same spiritually weak mind that allowed picking up cigarettes in the first place. What would we expect that same carnal (spiritually weak) mind to do but what it did?
The carnal spiritually weak mind is weak by spirit because when a man chooses to sin he separates his mind away from God and God's instructions to his mind. Thus a man's mind no longer really knows what to do in these situations and so simply does what it feels best to the body and that to the carnal mind is whatever comforts the body so as to quiet it's cravings for sensual needs. Man's mind has been demoted by sin (sin, meaning, missing the mark of God's commanded standards) to only matters of what feels best to the principal thing a man's mind now only listens to, his fleshly body. Thus the reason it is called a carnal mind.
That, however, creates the illusion to the carnal mind that it is in control. Why and how? Because the carnal mind is on a temporal basis able to satisfy the cry from the body for the satisfaction of it's corrupted sensations.
Christ died to take the sins of the world to himself. Some say he did that all on the cross but that falls short of the full truth. Christ's visible body of believers yet walking this earth bring many with carnal minds into that body every day. And we see the evidence of it in many ways; by bickering and bigotries and a preference toward feel good doctrines rather than the pure truth of God. Since man's flesh has been poorly governed of man's sin weakened mind since Adam's choice to sin, God's pure ways do not feel satisfying to man's now corrupted cravings of the flesh.
It is now next to impossible to have a church gathering in the visible realm apart from yielding to the temptation to scratch peoples ears with twists of blemished doctrines that will somewhat keep people willing to attend. Even then that is why there remains such a great turn over in attendance.
This is a good reason to re-examine all that one believes, praying constantly for God to open our eyes to his truth and not giving up seeking to know an to grow in that truth once God mercifully does reveal it to us.
The carnal mind is unafraid to force itself to the front and center stage in it's effort to satisfy the corrupted flesh. Thus much false doctrine has been formulate over the last two millenniums. But when we are willing to completely empty ourselves and approach God with open minds hungry to learn what we did wrong, God is willing to teach us.
Do not ever doubt God's love because of what the carnal mind and flesh of man does. Satan would rejoice to see you give up to despair by reason of the trouble he began for us there in the garden of Eden.
