The USA undeniably has a low macro rates of homelessness overall, but I wonder if it has high micro levels of homelessness, e.g. Sydney seems to have lower rates of homelessness than San Francisco or Seattle, even though Australia has a higher homelessness rate than the USA overall. I wonder as I can't find any data that uses the same measurements across cities and countries and is easy to compare.
On numbers, Seattle has 12,000 homeless according to wikipedia, and I can't find similar numbers for Sydney. Given Sydney is about 15% larger than greater Seattle, it would need to be closer to 14,000 to be the same. I doubt Sydney has that many Homeless, but with no data I guess it may.
I could be completely off base here, but I do think the USA has some really concentrated pockets of homelessness, and that skews people's views, in both directions, based on personal experience.