Need to exist? It's not so much a matter of 'need to exist' as it is a matter of logical progression!

Just ponder this for a moment - with all the leaps and bounds that have been made in the last century with information availability and processing speed of computing and even now 'AI', heck, when I finished high school a pocket calculator was only just coming in and you had to be rich to have one, now look at the mobile phone in your hand and consider what it's capable of or the computer you are using to communicate with me - an unknown stranger on the other side of the world etc etc I could go on! Now consider the cars that we drive - in the last century they have become less efficient and apart from some computer wizardry which now makes it impossible for the average person with a bit of know how to work on his/her own vehicle!

What's wrong with this picture? While everything tech has been exploding in advancements all around us, we are still driving around in cars that run on technology that hasn't effectively changed in the last 100 years!
You may as well ask why does 1 plus 1 = 2 !

Now getting past that point of natural progression, top level people have come out and said 'that we have the technology now to take ET home; - if this is true then the question changes to 'Why do they NEED to keep us in the dark about it?! The answer is of course - 'Vested Interested Parties' whose bottom line drives the 'Information Technology and Energy Machine'. They have it ALL at their finger tips and yet they choose to keep us dumb because of the almighty dollar and the power trip that they enjoy having over the rest of us!