he's absolutely right
"From a commercial point of view the city looks to be dead and the biggest event of economic nature they had for decades was Sanji selling soba noodles."
thinking back on older arcs, their simple worldbuilding makes sense
only looking economically
baratie = sells food to pirates on ships, restaurant itself is moving so it can reach many pirate and marine customers, it's a ship so they can fish, it's huge so a farm inside would be kinda sci-fi but make sense in one piece
Arlong park = basically tax the citizen who have jobs, farms, etc
Skypiea is two economies, the city and enel area has gan fall's slaves working the farms or something for food
Water 7 is a full fledged city, making money on shipbuilding expertise
Alabasta is like one big country with many cities, farming, trading with eachothers, Crocodile's casino, money from travelers, etc
Wano really makes no sense economically