... what exactly am I excusing? I'm not entirely sure what it is you think I'm arguing. I'm simply making a factual observation - comparing the quantity of parks in 2 completely arbitrary and non-comparable city limits is a pointless metric that doesn't give us any meaningful information. Toronto's city limits are quite broad, and include a vast amount of suburbia where its extremely easy to build small parks/playgrounds, as well swaths of natural ravines and rivers that inflate the amount of greenspace. Most importantly, this metric tells us nothing about how much greenspace there is in urban areas such as downtown Toronto. Meanwhile Vancouver has far more restrictive city limits, which prominiently excludes parkland that is otherwise quite close to the city - such as those found in the University Endowment Lands, and the various mountains and greenspace north of North Vancouver.
That being said if I was going to try and analyze how much green space both cities have close to their downtowns, Vancouver wins no questions asked. Stanley Park is massive and is right next to downtown - 10m away from Waterfront by bike. Besides Centre Island, the only thing Toronto has that is even remotely comparable would be the Don Valley which is quite a bit further away. Like yes, I agree that Toronto does have a green space problem, the only question would be how easy would it be to solve.