Why did the Dwarf King understand? Because the dwarves had always been tormented by the Resource Curse. They were born to dig, stout and well-suited for underground activity, so as soon as they burrowed into the mountains, they could easily find mineral deposits.
No matter where mineral deposits are located, they are very precious resources. Being able to easily mine these resources, the dwarves had no inclination to develop other industries. Everything was purchased from the outside. Over time, even food, beverages, and clothing had to be bought, as they were unable to produce them themselves.
Successive Dwarf Kings felt that this situation was not ideal. Whatever they wanted to do, they had to be cautious, hesitant to quarrel with humans for fear of not being able to buy alcohol and thus losing their nerve.