Clearly the guy didn't have to pull out a working PoC in one week with a forced uppon JS framework that just changed its public API and not its doc and that need magic lines just for webpack to not crash.

Or that has to pull data from a manually written csv our client uploads at 3 pm on their managed ftp and an untested REST api designed last month by a one man start up, using a legacy client lib that only god and a fired engineer knew how to get to work.

Or that has to be done with a trainee designer that knows photoshop but will "learn this css thing on the way" , a remote turkish consulting firm and your boss dog barking next to you because animals are good for moral and we are agile right ?

Those theories are good in a lab while writting carefully crafted c for the board you designed the spec for.