Yes, and what's Markham's current modal mix? Built form mix? That tells you all you need to know about those policies and their effectiveness.
As I'm sure you know as well as anyone, they are ahead of most suburbs both in the GTA and in general. If your point, writ large, is that there is little point promoting intensification and TOD in suburbs - because if Markham can't do it, no one else will - that's a bigger argument and you're right: all we need is the DRL, non-stop development in southcore and there's no reason whatsoever to gripe about Ford opening the Greenbelt. Let him scrap Places to Grow too - no point, the policies being ineffective and all.
For my part, despite their shortcomings, I take heart in Markham's evolution from what they built in the 70s/80s to Cornell to Markham Centre to Langstaff Gateway. It's a consistent path going in the right direction and far more laudable than what most of the other GTA suburbs have done, which is stick to what they know and treat the Places to Grow minimums as maximums. But no, let's pick on Scarpitti.
If the fact they didn't singlehandedly turn around the North American standard for development since WWII in a generation is proof in the pudding of failure to you, so be it. And if you think the policies are ineffective, you should talk to BILD and look at the difference in housing stock that was being built in Markham in 1988 and compare it to 2018. I feel differently, suffice to say.
As to these proposals - well, do you think they will sell as well absent the promise of a subway line?
That's a question for a developer. Ask the Gupta guys proposing 3,000 units where there's no subway. Ask Liberty how World on Yonge's 4 towers sold. Ask the Vanguard people, just south of there. Ask Mizrahi how many 40 storey towers they have coming across from Centerpoint.
Besides, everyone can take a 10-minute bus ride from Steeles to Finch anyway so "easy access to TTC subway" will go on the brochures either way.
As for the area closer to Highway 7, there's a group here that keeps asserting RER on the RH GO line will more than serve that need, so problem solved there too.
The major problem is that York Region does not pay a dime into the TTC outside of the farebox. With Vaughan, Torontonians are upset that they are subsidizing minimal riders that don't pay the property taxes necessary to actually fund the system.
Meh, I've always found this argument to be weak tea. Toronto famously only subsidizes 20% of operating costs. That means a Vaughan resident pays 80% of what a Toronto resident pays at the farebox and I don't think that 60 cents is quite enough for 416 residents to get all haughty. Call me when they properly subsidize TTC and stick to a transit plan for more than 3 years.
I agree the seat argument is largely an eye-roller. "I pay 60 cents more than YR residents and can't believe I get on the subway at Eglinton and can't get a seat!" So go live in York Region. Or Caledon. But definitely not New York City or Paris or London or Tokyo- you won't get a seat there either.