]Time to let go of some stereotypes of what it is to be Jewish nowadays and look at...
By way of example of how things have changed, there's a whole network of lesbian and gay Jewish couples with kids living in these downtown areas and using these Jewish institutions.
That's overstating things rather dramatically, isn't it? South of St. Clair Toronto has no kosher restaurants (save a Financial District snack bar), no kosher butchers, not more than a handful of full-time synagogues (from hundreds), a lone Jewish day school (from dozens), no stores that sell Jewish religious scriptures (from a dozen or so), and so forth.
That's not by accident. Sure, there are Jews all over the city. Koreans, Italians, Persians, too. But these and most other ethnic groups have areas of the city where their settlement patterns are more intense, their communal institutions more numerous, the commerces catering to their particular needs more plentiful, and so forth.
Acknowledging that isn't stereotyping. It's basic urban geography.
the real picture which goes far to explain why a Jewish centre would persist in the city
This seems a bit disingenuous, too. The reason why philanthropists -- who do not themselves live downtown -- funded the renovation of the Bloor JCC certainly does have much to do with history and that building's historic presence. The fundraising campaign was all about revival and outreach. The building's programming and use continues to involve much use by groups outside the Jewish community.
Those are all good things. But it's quite fair to say that Bathurst-Centre, say, is in a thick zone of Toronto's Jewish life today in a way that Bloor-Spadina once was, and now isn't. It's unfair to smear someone pointing that out as engaging in "stereotyping" or detached from "real life". If anything, it seems to me far less "real life" to announce that Toronto's Jewish community is no more clustered in, say, Thornhill-Vaughan than "all over downtown". This description (from
here) seems a fairer statement to me:
The GTA is a place with a wide spectrum of Jewish life. Are you looking for an Orthodox all-girls’ high school for students with physical or developmental disabilities? Or a pluralistic, downtown synagogue with a young population? Or a neighbourhood with so much Hebrew that it feels like a Tel Aviv suburb? The GTA has it all.