No it isn't.
Toronto is a great step forward, but League has been growing in North America strongly for 20 years.
In 1998 about 10 staff members of the Glen Mills schools started having Friday afternoon "scrimmages", led by former Saint George halfback David Nui, and from that, this year about 60 teams will take the field across the US, Canada and Jamaica. All that happened without Toronto, and if Toronto fell over today, the sport will keep growing strongly in North America.
Toronto is important, and should accelerate things nicely, but it isn't everything. A lot of guys have worked really hard for a lot of years to set the platform for this to happen.
If Toronto works, half a dozen teams will follow in the coming years, and the obvious next step is for them to form a North American professional league.

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As per usual you use an example that has absolutely no relevance unless rugby league had a UK league and a separate European Champions league.

Our nearest and closest (although much bigger) rival is rugby union. The professional leagues they have are, Eng Prem, Pro 12 (Wales, Ireland, Scotland and Italy), French league, Super Rugby (Aus, NZ, SA, Japan, Arg)

Rugby league has Super League and the NRL.

To expand our game we either need to make those leagues more multi national, or get a 3rd professional league going. The latter isn't going to happen without massive investment from the sport, if all profits from World Cups went into it maybe it could happen, but I don't think Eng and Aus would agree on that happening.

There is an appetite for the game in PNG, NZ, France, Canada and to a lesser extent USA and Wales. But they are not going to be able to make it happen on their own.

what? I'm sure you think you have a point here but God knows what it is. I drew no parallel between RL and football simply pointed out that the football structure has a de facto conference/play off structure, the route most sports have gravitated towards these days.