I disagree with the last two questions in the survey.
(tldr; q1: LRT is not zero GHG; q2: public transportation improves affordability in general including access to affordable housing)
For the first half of question 1 on zero GHG, he does not define the scope which is problematic because while Skytrain will require more concrete than LRT, the operating emissions over it's lifetime will be much less. When you consider in operating emissions LRT is not zero GHG. In the surrey rapid transit study it was noted that the surrey LRT would increase GHG by 38,000 tonnes. The second half of this question about using it across the city rather than just the Broadway Corridor is also flawed because it tries to pit one project against another when Skytrain is the only option that can accommodate the demand on the Broadway Corridor. LRT would be at capacity on opening day, thus meaning that however many billions would have been spent on an option that would eventually need to be replaced by Skytrain anyways.
The second question asks about spending money on cheaper housing. I would love there to be more student housing, but the issue of 'affordability' is not only defined by housing but also by food, transportation, and social activities. Funding transportation is a unique option however in that it can impact the affordability of those other factors by increasing choice. Choice of where to live while not being too far away from school and choice of goods with increased connectivity. Funding public transportation is a key way of making existing affordable housing options more accessible and thus it is a more effective use of funding that will benefit more people than just the select few that are lucky enough to receive subsidized housing. There are routinely 10,000 students annually on the UBC housing wait-lists. The Broadway Subway will benefit every single one of them. With his suggestion supposing that the funds saved could be used for housing (which they can't), they will receive no time travel or crowding benefits, and likely still not get into housing. The only people winning here are NIMBYs and urbanistic delusionals.
https://i.imgur.com/P0cHbSZ.png?1