Fresh dog food subscriptions sell three things that a bag of kibble doesn't. The first is the ingredient list: lightly cooked, human-grade meat and vegetables you can recognize, instead of rendered meals and extruded pellets.
The second is precision - portions are calculated from your dog's age, weight, and activity level, which removes the guesswork that leads many dogs to be quietly overfed from a scoop. The third is convenience of a specific kind: pre-portioned packs on a recurring delivery, so feeding correctly takes no math at all.
None of these is magic, and all of them cost money - fresh food is priced per dog and lands meaningfully above typical kibble for the same calories.