I was agreeing with your definition. If you buy housing as an investment as opposed to using it for shelter, that could be an example of financialization of housing.
There are many definitions, and different people use different definitions. That's one I like to work with. There's probably some merit in coming up with some standardized definition that we all agree with.
I think it's important to note that with regard to financialization, 95% or so of the rental market is owned by investors. It's not government-provided; it's investor-provided units, and that is the most affordable part of the housing market.
We need more financialization. We need more investment dollars in order to increase the rental supply, because I think that's where the affordability crisis is the most acute.