Many municipalities were slow with Secondary Suites, or in cases like Toronto, flat-out refused to allow things such as coach houses in their zoning.
My comment was perhaps tinted by my own ideological lens as I am way more in favour of finding supply-side solutions to the affordability crisis. I am of course weary that changes to other legislation such as inclusionary zoning may reduce potential housing access for peoples are the lower rungs of the income ladder, but simultaneously, all the interventionist policies of the previous government failed to do anything for the lower-middle income percentiles where I think the greatest interventions needed to take place.
The lower-middle or working class is the one being squeezed out to the suburbs by the rising cost of housing in Toronto, and they cannot qualify for the units built under the inclusionary zoning policy tools, or the affordable units provided by non-profits or government agencies. Development charges being dropped for rental units and the legalization of all secondary unit tenures under municipal zoning can lead towards a greater supply of both, and greater access to housing for those classes.