Unless you live in Medinas Yisroel or in certain enclaves or on a kosher farm, the trade-off of cost and quality should be an issue.
So, especially, if your lifestyle is subsidized by a generous shver, or you rely on kulos to accept communal funds or goyishe welfare or pandemic emergency funds – and spend that money on less healthy amd more expensive foods? Then, H’V spend additional funds on treating health of children who were not eating healthy. I am not saying this is a clear cut issue. Just wondering whether people thought of the issue and have enough health education about this.
references:
R Salanter disregarded pas yisroel when on a health trip to waters, subsidized by a friend.
Alter from Novordok would not let his daughter buy new dress as they were paid as part of yeshiva funds.