A lot of these effects destroy just one land, but mass land destruction destroys lots of lands at once
The actual enchantment wouldn't be exciting on its own, but bundling it up with an efficient removal spell certainly makes it more palatable to include a seven-mana enchantment in your deck
Most expert builders recommend running 8 to 12 Basic Pokemon to ensure a smooth, consistent start in every single game
If nothing else, being able to activate Arthur, Wizard's Apprentice and grab three points of lore on your turn at the cost of another card may just be the thing you need to boost you over the finish line and grab a victory ahead of your opponents
As such, playing games where one side doesn't get to play does very little to help design learn anything
Plus, you can cast it later when you draw it again, which is just value on top of value