Disagreed. There are beliefs and there are religions which are simply people with the same beliefs.
A person doesn't need a church to have beliefs, but if they belong to a religion, there are rules for that religion.
For example, how could a Satanic cocksucker like PmP be a Christian based on his total abandonment of Christian values? He can't. Sure, he can say he believes in Jesus, but his actions are totally contrary to the Christian religion therefore, he's not a Christian.
https://www.merriam-webster.com/dictionary/religion
Essential Meaning of religion
1 : the belief in a god or in a group of gods
Many people turn to religion for comfort in a time of crisis.
2 : an organized system of beliefs, ceremonies, and rules used to worship a god or a group of gods
There are many religions, such as Buddhism, Christianity, Hinduism, Islam, and Judaism.
Shinto is a religion that is unique to Japan.
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3 informal : an interest, a belief, or an activity that is very important to a person or group
Hockey is a religion in Canada.
Politics are a religion to him.
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Full Definition of religion
1a : the state of a religious
a nun in her 20th year of religion
b(1) : the service and worship of God or the supernatural
(2) : commitment or devotion to religious faith or observance
2 : a personal set or institutionalized system of religious attitudes, beliefs, and practices
3 archaic : scrupulous conformity : CONSCIENTIOUSNESS
4 : a cause, principle, or system of beliefs held to with ardor and faith