I lost several dress sizes by eating things like organic beef. I have a medical condition that causes malabsorption. It is routinely treated with expensive prescription digestive enzymes, plus large amounts of prescription drugs.
I'm a former military wife. Technically, I should be able to get the $100k/year or more worth of medical treatment I am supposed to need for free, at taxpayer expense.
Eating right is vastly cheaper, saves all kinds of tax dollars and also gives me a hugely higher quality of life. Win/win/win.
Does anybody thank me for doing the right thing here? No. Instead, I am frequently attacked for any number of reasons, some of which seem to be rooted in this idea that poor people aren't entitled to eat well, and their health be damned.
You have no idea what that person's needs are. Being able to see that they weigh a lot and what they purchased on a particular day doesn't really give you enough information to know if they were spending wastefully on frivolous purchases or not on that day.
If someone who's dependent on EBT money is spending it on caviar and filet mignon, they're going to go hungry for most of the month. Restrictions just add administrative overhead without benefit. (They also make the program more paternalistic and potentially stigmatizing, but that's a different argument.)