Forgive me, I'm not totally sure what the purpose of this site is. I'm assuming it works the same as the others though. So I'll just expect quality and won't bother explaining the pained effort behind the metaphor I intend to use below.
Imagine everyone alive is a different species; some other creature like a hyper intelligent fish... or something. There is only one human being in all of existence and, for obvious reasons, he is still proportionally more intelligent than us. All of us fish know of the human because he told us he is responsible for all of reality, and also he told us his name is Yahweh. We believed him and now we worship him. Sometimes we even discuss his majesty among ourselves. Alright, metaphor complete.
When we discuss him though, for some reason we call him 'Person', rather than 'Yahweh'. This is strange, confusing and seemingly grammatically incorrect. We would never say 'Friend and I are starting a bowling team. Would you like to join?' We would say 'Tom and I' assuming the 3rd party is familiar with our friend, and if they weren't we would say 'My friend and I'.
The reason we would never do that is because 'Friend' is the kind of thing 'Tom' is... To you at least. Stated more broadly: 'Fish' is the kind of thing 'Tom' is. Likewise, 'Person', is the kind of thing 'Yahweh' is. So if we as fish, should be forbidden to use the name 'Yahweh' for some reason involving an antiquated definition of vanity, then we should instead say, 'Hey Tom, I was wondering if you are familiar with the word of my person...', rather than 'Hey Tom, I was wondering you are familiar with the word of Person...'.
And finally, I understand that the idea behind a mono-theistic religion is that there is only ONE GOD, if for no other reason than that this is typically the response given to answer this question, but it seems to be an inadequate reason to forgo the grammar. So lastly, why then does this seem to be the go to answer anyway? It almost appears that many Christians fear saying 'My God' equates to a concession that other gods do exist, while they only worship Yahweh. Is that an accurate assessment of the situation? If not, then what is the correct assessment?