Oh really? Explain the caves, trees, the moon cycle, and physics. You need to stop being a hypocrite.
A. You obviously don't know what a hypocrite is.
B. Most games are at least somewhat grounded in reality so we have a basic understanding of whats going on. That doesn't make the game realistic. Minecraft is not realistic. Zombies and skeletons are unrealistic. Punching trees to get wood is unrealistic. Removing a block of wood from a tree and not having it fall is not realistic. Trying to force realism on an unrealistic game is stupid. In that case let's remove diamond weapons and armor, zombies, skeletons, the nether, ghasts, blazes, slimes, pigmen, magma cubes, the end, enderman, the enderdragon, redstone, villagers, and squids with teeth. Realism is not a good argument for the addition or removal of material to an unrealistic game.
Do you realize that lightning is very rare? Even if it did strike sand, there would be very very few glass found in sand.
So, what you're essentially saying is this suggestion is even more pointless than it was before? So now, its not only unnecessary, it's useless. Great. So you are saying that is merely for aesthetics? In that case, I personally think weird one block deposits of glass dotting deserts and beaches would be hideous.
That's not the point.
Then what is the point?
Nobody ever said it would be a 1m3 glass block.
Notch has confirmed that the blocks in Minecraft are 1m3.
So what? The clouds are useless, and so is the rain. Hmm, why don't we remove EVERYTHING pointless from the game? Then let's see how MC will be.
Those add aesthetics and atmosphere. This add ugly scarring of the landscape for absolutely no reason.