I have a wild conspiracy theory: I think the owners of Highway 407 are bankrolling the opposition to 413.
Unlikely as they would be one of the leading candidates to build and operate it. Plus it'll provide negligible impact to their traffic patterns, 413's alignment is too far north.
The government has said it won't be tolled.
The operate the 412 and 418 and they aren't tolled. And they've been involved in countless other non-toll road projects throughout the province, let alone globally.
Whether the revenue comes from tolls or private clients or government coffers it doesn't matter to them.