That knowledge is severely out of date, then. You don't need bedrock to build skyscrapers, and indeed the tallest skyscraper in the world, the Burj Khalifa, is built on top of sand with no connection to bedrock whatsoever. You just need to pour immense amounts of concrete to serve as a foundation.
Which is cost prohibitive and doesn't make sense for any other entity other than "let's light money on fire + enslave people to flex so the cool kids like us" UAE.
it's not a good look. hope my comment doesn't flag me in unforeseen ways 20 years from now.
To be clear, I'm saying effectively yep need bedrock otherwise it makes zero actual sense. (I do take you point, and lesson learned on my part)
It's not cost prohibitive, it's a technique that is widely used in US cities too. The cost of building the foundation is still small relative to the cost of acquiring the land and building the rest of the building.
