I suspect this is targeted more at urban areas - in NYC there are a ton of neighborhoods where the local grocery store options are limited to bodegas, most of which carry primarily or entirely processed and pre-packaged foods. Nothing wrong with that inherently, but lack of access to fresh produce and meats makes it more difficult for families to eat healthy.
Many of those neighborhoods are gentrifying, or near neighborhoods that are, and the higher income folks that move in can afford to have someone instacart or uber eats better quality groceries from a few neighborhoods over, an option not available to people on EBT.
For Uber it makes sense because the physical distance is likely not substantial, which allows the economics to work for the drivers, particularly if they can do it on an e-bike or scooter. In rural areas I would be concerned that the round-trip drive times are less appealing - I've already seen a lot of discussion on the dasher subreddit about how rural restaurant delivery is less preferable because of distance and a perception that tipping is not good relative to the effort required.