Everyones circumstances are different. Some have close family and friends that they are "emotionally" attached to and this makes it difficult (even if one no longer feels and believes as they do).
Then there are those who have been told that there is no other place to go "outside" of "the organization" and there is a modicum of belief within the individual that they might lose out of the prospect of eternal life if they severe ties with "the organization." Sadly, many these individuals have not come to understand that Christ is "the way, the truth and THE LIFE" not a religious organization as they have no power of granting eternal destruction and eternal life. Religious organization has "stolen" and "usurped" a role not given to them.
There is a certain fear of leaving the organization. Many who leave (whether by disfellowshipment or disassociation) eventually go back because of this "certain fear" that there is no place to go and that they will lose their lives if they are out of the organization.
After more than 30 years as a baptized JW, I left quitely by disassociation. This came as a complete and utter shock to those who knew me. No one was expecting it as I would have been counted as the last person to leave the organization. I remember the last meeting I attended (the Service Meeting) and I knew on the evening I walked out of the Kingdom Hall, I would not return. I kindly said "good night" to the "friends" as I usually did but would not return.
No law on earth can keep you bound to a religious organization. When one became a JW you did not sign any legal documents, you just uttered a baptismal vow.
A close look at the wording of the baptismal vow shows that it is a vow to "the organization" and not to God and Christ. The wording of the vow says that it is "the organization" who decides whether one is a worshiper of God. It says as long as one is associated with the organization one is then a "Jehovah's Witness."
Worshipers of God and Servants of Christ are not to be determined by any human agency. No religious organization paid the price for the purchase of mankind. Only Christ paid that price and is thus mankinds Head and Owner. (1Cor 11:3)
It is Christ who will determine who his true servants are, not any religious organization. (Matthew 7:21-23)
If possible, I would advise one to "get out" of ALL religious organizations. Count it as a blessing and rejoice AS LONG AS you go to "The Person" of Christ.
There does not exist anywhere on earth for Christs true disciples to go "into." In other words, there are no religious systems or organizations established by him that we are to go "into."
Christ did not go "into" anything. In fact, he "went out" into a wilderness and was there tempted by the Devil. Christ called his first 12 disciples "out of" a religious system "to himself."
The Apostle Paul knew this very well. He knew that Christ did not establish a religious system (but a Brotherhood) and Paul cautioned that Christs disciples were not to "go into" systems of organization (camps and cities) to worship the Father and serve Christ BECAUSE none existed.
Rather, Paul taught that true disciples of Christ were to "GO OUTSIDE" those established things. It was "OUTSIDE" the camp that Christ was. So rather than join and "go into" these camps, we leave them and "go outside the camp" to the person of Christ.
Notice at Hebrews 13:13-14 that disciples of Christ have not city (place of organization) to go into, it is yet to come.
"Let us, then, go forth to him outside the camp, bearing the reproach he bore, for we do not have here a city that continues, but we are earnestly seeking the one to come."
Do not confuse this with meeting together. Meeting places today under the banners of Catholicism, Mormonism, Seventh Day Adventism, Jehovah's Witnesses (WTBTS), etc are "cities" where people are organized and divided.
This is not what God and Christ intended as discipleship is to the "religious organization" and not "to Christ."
Neither did God or Christ command anyone to be called by such titles. To accept such titles upon oneself make one an adulterer as the title/name Christ told us to be called by is simply, Disciples.
To take another name other than the one he told us to be called is like being married to another person (religious organization or system).
The world is in an adulterous state at present.