Taxs on investors are quite high in Ontario/Canada compared to California. Not only does this minimize the outcome for the investor - it decreases the risk for making larger bets on big outcomes. In terms of exits -- you have a smaller playing field and fewer buyers being based in Canada vs USA. All the things add up to make a smaller opportunity for investors and builders and you work harder to pay more taxes to the government.
In terms for your ambition argument -- that could be an inherent problem in Canadian culture that no one wants to change the status quo - it is definitely a different culture than SV. The largest city is captured by financial industry for the most part which doesn't bode well for innovation.