The same reason Judaism, Christianity, Islam are still things... as long as you have religions that have strong followings and have had them for over 1000 years... then you can expect to have those reject these religious beliefs being a thing still.
@king_saturn: You know, there are bible prophesies that God will reveal himself to the entire Earth...at Armageddon.
You make a good point; one thing to make the Bible authentic are the many prophesies of the Bible that have come true. Since Biblical prophesies are true, that makes them significantly different than just any prophesy. If you noticed the recently media, and you have a certain level of familiarity with the Bible, you'll note Biblical prophesy unfolding right before our very eyes. You raised the one point that I forgot to raise in defense of the Bible.
God tends to reveal Himself to individuals; people testify to God revealing Himself to them all the time. God will vividly reveal Himself during Armageddon, as you noticed.
The point was Why can't GOD reveal himself to everyone like Now before the world is dying or tearing itself apart. For GOD to reveal himself to everyone at the end of the world is pointless... as the world itself is dying... and it's not like GOD does much for the Non Believers at that point anyways according to these proposed prophesies.
As far as revealing himself to individuals... that's trivial ( n!gga could be hallucinating or simply saying he saw GOD when he didn't ) ... that's what makes it problematic... if GOD revealed himself to everyone at once before the world is dying... then we could have literal physical evidence of the encounter... especially if it's like one of those Mount Sinai type of events with Moses and the Israelites.