To be clear I didn't suggest that, I think I implied the opposite.
Your preference is against upzoning single family neighborhoods thought right?
Well idk that it would only open up more rentals. Even sticking to single family homes you can add a lot of density through zoning reform. Reducing minimum lot sizes, removing parking minimums, and narrowing roads are all things that are against current codes but would allow for more density in single family suburbs. Smaller homes also means they're more affordable, basically starter homes.
I asked ChatGPT to generate an image of a mixed use, car lite community of mainly single family homes but with bike lanes instead of roads and much smaller lot sizes and homes.
That's technically a single family neighborhood but fits a lot more homes when you don't mandate that everyone has to have a yard and has to drive everywhere. These could be starter homes in lots of cites today but you're not allowed to build that in places like San Jose where NIMBYs reign.
Setting that aside, I don't know if the government should care either way when it comes to home ownership, general affordability is a more important metric than homeownership imo. There are pros and cons to both renting and owning so its up to each individual to decide what they want to do based on their circumstances.