It's easy enough to put forth the proposition of "if only we invited the likes of Zaha Hadid" on paper, but at a more fundamental level, we need to ask ourselves: is this a city and country that (still) believes enough in itself and the future to exercise such daring?
Toronto, Canada, North America, and the broader West are in a state of decline and malaise that isn't simply a matter of economics or politics, but rather something deeper: a crisis of civilizational morale and self-confidence.
Say what you want about China, Southeast Asia, or the Arab Gulf States, but those are civilizations that (for both better and worse) believe very much in themselves and the future in 2025.
There's a reason that we built Union Station 1.0 in the 1920s and the world's (then-)tallest structure in the 1970s, but can't exercise an analogous level of transcendental transformative ambition in the 2010s-2020s. We've simply become too comfortable.