Actually a lot of older people quite like living in apartments - no gardening, someone else cleans the gutters, windows, looks after the exterior. But there's very limited options that are good for people like that.downsizing is a touchy subject - a few politicians have mentioned it in recent years and immediately been torn to pieces for "trying to force old people out of their homes". The main issue is there are very few suitable properties for older people to move into, they don't want small apartments where their neighbours are all short-term renters. There's also issues around financing, and I suppose general inertia. But there's undeniably a lot of older couples rattling around in large family homes that cost a fortune to maintain. I get the impression in other countries (the UK for example) it's more common to downsize in later life.
Its the same thing as the effort to cater for tenants after 2010 - any slightest hint from a government and they were immediately accused of trying to turn the population into a nation of people owning nothing.