They never implied 100% of people, they said if your personal choice can be criticized if it has victims. Most people don't view "buy food I can afford or I/my family starve" as a personal choice. It is not even close to "let them eat cake." 8/10 people are not in poverty, and 7/10 could without much hardship reduce their meat consumption to near zero. 9/10 peasants could not eat cake.
"You live near a walmart" is true for the majority of Americans, and probably 99.9% of people on lemmy. The implication is almost anyone reading that statement has no excuse, and that if you don't live near anywhere you can get vegetables, then you are one of the exceptions implied by you not starving not being considered a "personal choice." Arguably you could consider that a personal choice, but when their example is "which T shirt to pick" I don't think that's their implication.