uh I think you have the collective rule or something from liberty? otherwise I don't really understand how you get 10 hammers
like beetle said, unemployed citizens give 1 hammer. but i'm pretty sure they still eat up your food. the excess food that you have while training settlers is converted to hammers following a weird rule, but it's usually not worth it compared to putting citizens on hills
i don't think tile locking is overrated, especially in the early game. the governor doesn't know how to get absolute max production when building settlers even if you set to production focus. the total amount of hammers you get from the tile locking trick is not a lot, maybe 100 hammers over the entire game.