This has always been ridiculous. This kind of Inclusionary Zoning doesn't apply to detached homes, only to highrise condos - that is, to small units that are for many people how they're entering the housing market. Expecting builders to cover affordable housing raises costs for those buyers.
I firmly support affordable housing developments, but expecting housing for those most unable to afford it to be funded by the second-most-unable is insanity. Every other social project is funded by taxpayers, but somehow in a housing crisis where we've a massive shortage of housing, we expect to shove a boat-anchor onto the costs of the very people we expect to solve the crisis and let them bear the cost? That's lunacy.