While that is great and all, the problem with that TC mindset for corridors like Eglinton and Don Mills is that ridership is already far too high to not invest in faster rapid transit. For Finch West, Jane, and the Waterfront it's a different story, where revitalization is absolutely necessary. Hamilton and KW as a whole also fit into this category of needing to revitalize key transit corridors without needing the huge speed boosts provided by subways or High Floor Light Rail.
To clarify, Light rail on these specific corridors should still be fast (even though the RoW arguably cheaped out on iON, it's still at least 30% faster and 200% more reliable than the 200, and those numbers could grow in the near future as the teething problems are resolved), but it doesn't require suburban subway speeds.