world edit was disabled last season because of a dupe glitch. they neglected to fix it, and then this season players requested it to not be added as its very op and resembles p2w
there is a perk called fastplace which can place up to 9 blocks at once, or you could use build wands which build 5-6 blocks at once. these are all much cheaper, available to a larger demographic, reliable, and dont create too much of a gap between people who pay to pay and those who dont