I have no idea what the author is trying to say.
I understand that he is has issues with the often dysfunctional nature of organized religion. He has some vague defined problem with putting restrictions on God, or putting God in “a box”. What restrictions are these? What is about the nature of organized religion that puts these restrictions there? What would any faith post-religion look like? Would it be faith without community? Would be a free-for-all: would be just do whatever they want? Would be choose their own canon of Scripture? How can one be a Christians with Scripture when all that we know of Jesus comes from scripture which, in turn, is the product of organized religion (guided by the Holy Spirit)?
The problem with this sentiment, and others like it, is that they don’t really mean. They take the justifiably upsetting parts of organized religion, throw the baby with the bathwater, and propose nothing except some vague spirituality to take its place.
Does the author see values in a wedding or a funeral? Because those are provided by organized religion (or a secular proxy). Does he understand that an essential part of the Christian life (barring, maybe, a hermit’s) is community? Is it OK to worship together? Because that’s organized religion too. Organized religion has its problems, but it also provides something essential. Consider that even secular humanists are popping up with Sunday services meetings. Religion is universal. Its written into DNA. Religion, or some sort of secular analogue, is just part of being human.