The whole point of the sign is you can see it from far away. If you look at it from the street in downtown Hollywood or whatever, you are experiencing the sign as it was meant to be experienced.
For people who... for some reason... want to go RIGHT UP to the sign... or behind it... sigh — This is an interesting compulsion which I normally would not judge. But we're now talking one hundred million dollars and untold materials and effort... to help visit... a SIGN. Literally just a sign that says, "Hollywood." Up in some otherwise beautiful nature.
To enable this dysfunctional behavior with this kind of money and technology is nuts. Go to the beach. Go for a hike. Come up with some other utterly unimaginative scheme to visit an object you saw on a screen.
Sometimes it is better NOT to apply technology to a problem. Let's NOT make this easier to accomplish. It's pointless, thoughtless behavior with no worthwhile reward.
To quote an actor named Will Ferrel dressed up as an imaginary fashion star named Mugatu, "Doesn't anyone else notice this? I feel like I'm taking crazy pills!"
("I invented the piano key necktie! I invented it!!")