Does Publix not sell premium meat and cheese? The grocery stores in my area do and somebody could definitely get away with that here.
Much of making a good charcuterie is individually separating things on the board. We are paying for a combination of the time it took to assemble plus the time we will be continuing to eat it and for them to clean up.
Tbf, lunchables aren't cheap af because they're not "adult meals". Well, in a way they are, but that just stems from the ingredients being garbage. If you make it with real food, of course it'll be more expensive.