Because that’s how the blockchain works. Without validation (which is what Mining does) anyone could just claim they have e.g. 1 million XMR when they have zero. Because you don’t have a central authority in crypto currencies, you need some other mechanism which verifies that transactions are legitimate. That mechanism is a whole bunch of complex math, or in other terms, Mining (in the context of crypto currency). Glad you like XMR though.
Because that’s how the blockchain works. Without validation (which is what Mining does) anyone could just claim they have e.g. 1 million XMR when they have zero. Because you don’t have a central authority in crypto currencies, you need some other mechanism which verifies that transactions are legitimate. That mechanism is a whole bunch of complex math, or in other terms, Mining (in the context of crypto currency). Glad you like XMR though.