An even more important question for believers is why, given that God does communicate with humans, that he does so in such an obscure way: scriptures with unclear meanings, accumulation of tradition, visions with messages, personal revelations… why not a clear weekly briefing by an incontrovertibly supernatural source?
There are two reasons for this.
The first is that the way we have developed language and the intellect is centered on the natural, sensory world, and the message God has for us is necessarily about that which is beyond nature and the senses.
So we have no reason to expect that God’s message
should be clear to people who have developed their entire frame of reference in a world that is vastly more limited than the truths that God is sharing. If God’s message were
not “obscure” (to use your word), then it would be
wrong, and it would not be Truth.
The second reason is related. Although our mind was formed in the natural world, it has the capacity to understand divine things. But like any mental capacity, you do not acquire it unless you work to develop it.
For example, the mind has the capacity to understand advanced mathematics, but to those who have never worked to develop that capacity, the principles of high math will seem mysterious and obscure.
If we are to be participants in God’s Kingdom, it seems reasonable to expect that we should develop an understanding of the nature of that Kingdom. But we do not do so if we never work to develop that understanding. By teaching us the way He does, God provides training in how to elevate our minds to that level, so we may come to know Him as He is, rather than as how our limited human minds would imagine Him to be.