You have to look at age and location. If you characterize the whole US you're including people who are much older and people who live away from very urban areas.
Among older people and in small towns and villages the housing problems, are of course, much milder.
In California, it's about 56%. You gave to get San Francisco proper to get a minority and then it's still 38% (https://www.census.gov/quickfacts/fact/table/sanfranciscocou...)