Why does Bitcoin need to be mined to be obtained?

Bitcoin is a piece of artificial code. Why is it designed to consume a lot of electricity and graphics card computing power to mine it? If it is to ensure scarcity, it can be obtained by an algorithm according to a certain probability, without consuming precious electricity energy on the earth, nor spending huge amounts of money to buy graphics cards.

Combined with Nvidia's stock price, it is bold to speculate that Satoshi Nakamoto is the boss of Nvidia?

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