Your argument against Distributism sounds like a defense of “creeping Distributism”.

Times change and, as Pope John Paul II pointed out, the applications of the doctrines of the Social Encyclicals change as well. So, for example, we don’t all go out and grub out an existence on 40 acres of land, we have 401K plans, or our own computer shops. Time change. Conditions change. Resolutions change.
I am not persuaded Belloc was wrong in his time in suspecting that wealth would tend to concentrate in few hands. One has to remember that he was not talking about America, particularly. Nor was Chesterton in decrying the situation in England in his time when untold acres lay untilled in England while Britain imported most of her food from her colonies, and the working class in cities lived pretty badly from paycheck to paycheck (or dole to dole) and owned nothing. Chesterton, in particular, was highly favorable to small business, and who provides 80% of all new jobs? Small business. You favor wealth creation? So do I. Read “The Millionaire Next Door”. Most millionaires are, in fact, small businessmen who live prudently and provide goods and services that people want. Very few inherited it. (Granted, many of the ultra-millionaires did.) And most are religious, by the way. So much for religion stifling enterprise.
I’m not at all sure that Belloc, Pope Leo XIII, Chesterton and Lewis shared the same vision as did Dorothy Day. In my mind, those who follow her thinking have highjacked the term “Distributism”. I’m not persuaded that Pope Leo XIII had “communes” in mind. Indeed, they are not really consistent with “subsidiarity”, are they, when the economic system allows for family acquisition of productive assets and some degree of independence at that more proximate level?
Finally, let me say that, in my mind at least, Distributism is at least as important as an aspect of one’s own thinking as it is of societal structure. How many Americans, for example, would have been a lot better off in the last decade or two had they invested the money they squandered on consumer goods, on productive, inheritable assets instead? We could have all done a lot better than we did in that regard. We even borrowed money to buy the junk, and to take that “free” trip to Vegas. How many of us have adopted corporate or government ways of thinking because of our dependency on those institutions, when we could have been more independent (and Catholic) in our thinking had we not listened to their siren songs?