You're ignoring the entire tradition of mystical and contemplative Christianity. (I don't think that most people who post to boards like this realize quite how mystical the Eastern Orthodox traditions are.)
In the Roman Catholic tradition:
https://en.wikipedia.org/wiki/Christian_contemplation
And in the Orthodox tradition:
https://en.wikipedia.org/wiki/Hesychasm
https://en.wikipedia.org/wiki/Theoria
https://en.wikipedia.org/wiki/Theosis_(Eastern_Orthodox_theology)
Similar practices are even more prominent in some varieties of Islamic Sufism. The Hindu theists are famous for their meditative and yogic practices.
And it isn't necessary to be an ascetic or a monastic. Many everyday theists say that they sense the presence or the activity of God around them. It isn't all that unusual. It needn't be some dramatic opening up of the sky, like Moses on Sinai. It can happen in everyday events.
But let's assume that you are right. Suppose that all theists really do encounter God at second hand. How does that advance your assertion, which is apparently that whatever it is that theists believe in isn't God at all? I gave the example of Paris. I've never been to Paris and have never experienced it. So why should I believe that the Paris I've read about in travel books and the Paris others who have actually been there have described to me isn't Paris at all? Obviously the words on the page and the spoken words weren't the city, but nobody has ever suggested they were. Why can't the words
refer to the city?
You seem to me to implicitly be denying the possibility of linguistic reference, the possibility that words and concepts can refer to realities beyond themselves. (How that works is still an unsolved problem in philosophy, btw.)
Do you have better access to God than other people? You've written about your own "apotheosis". My question to you is this:
How did you experience this 'apotheosis'? Did you see God? If so, aren't you confusing God with a vision? Did you hear God? So aren't you confusing God with a sound? If you think that you sensed God through some unfamiliar sense channel, aren't you in danger of confusing God with a sense impression (of however unfamiliar a sort)? You've mentioned telepathy. So did the direct revelation of God come to you as an idea? You obviously have some way of representing it to yourself, when you try to understand what it was, when you remember it. You call it 'apotheosis'.
But is that representation in your head really God? How can you be so confident that you aren't doing what everyone else does and that you aren't just another idol worshiper?
I think that's one reason why practitioners of the 'mystical' traditions are never supposed to boast of their own attainments. Another is that in all traditions these practices are associated with reduction in what the modern West would call ego. So there's less motivation to aggrandize one's own sense of self. In Buddhism, bragging of meditative attainments and siddhis (supernatural powers) is one of the worst offenses a monk can commit, and it can get him/her expelled from the sangha.