If you have another architectural style for western civilization which bases its institutions on Greece and Rome, I’d be interested in learning more about it. It’s not necessarily about a 19th century view of 2nd century BC architectural concepts (which itself is a bit of a farce of a comment) but more so about anchoring the longevity and legitimacy of governmental institutions to a historical heritage.
Similarly I wouldn’t recommend, say, that the Afghani people or Mongolia for example build federalist or Greco-Roman style architecture for their government buildings as it wouldn’t make much sense and wouldn’t have any basis in their history.
There’s also some science to it and we know the asymmetrical buildings and buildings which make entrances and other expected features hard to find cause measurable levels of stress and anxiety in the observer. Hostile architecture.