The part where you did actually muddy the waters is that you assumed that the picture depicts problems in a “showroom - homeless person” context, which is clearly not the case (as you contradictingly say yourself and even recognize when you said: “when “capitalism” is written on the photo”). The picture clearly criticizes capitalism as a economic system, but you wanted to make the showroom the focus point of the photo. That is muddying the waters. You dismiss the original critique. Or at least that’s how I read your comment. The difference between “I was talking about multiple points” and “muddying the waters” is not that big.
On the other part, yeah, fair enough. I would compare it to a “utopian socialist society” rather than communistic, but sure whatever. I mean there are countries in the world where taking this picture is very easy, and some (socialist) countries where it’s take a bit of effort to find a situation like this to photograph in the first place (most nordic european countries, for example).
The whole point of the image we are both commenting is a critique on capitalism. You are moving the point slightly towards “critique on showroom owners”.
However let’s not get sidetracked here. In a utopian society there would be showrooms, yes. But the person would not be forced to sleep outside without a bed in such a society, be there showrooms or not. That is the point. Capitalism allows this, a socialist society doesn’t (just look at the countries with least homeless people and you’ll see)