You just laid out the sync process perfectly, but you missed the foundational rule of cryptography: A miner cannot dictate the hash; the math dictates the hash. You claim the node just confirms the UTXO set matches the number the miner wrote into the header, without knowing if the transactions were valid. But a miner cannot just write any random number they want. The utxo_commitment is a strict mathematical result of the ledger's entire history. If a miner tried to bake fake coins into that history a year ago, every honest node online at that exact second would have rejected the block instantly. That invalid block would have been orphaned and left in the dust. The only way that 'fake coin' hash could become the heaviest, valid Pruning Point Proof handed to a fresh node today is if the rogue miners successfully sustained a 51% attack against the honest network for an entire year. Kaspa didn't abandon verification. Kaspa realized that if an honest majority enforces the rules in real-time, the resulting Proof-of-Work header chain becomes an unforgeable cryptographic proof of the valid ledger state. You don't need to turn your hard drive into a museum of ancient data to enforce the rules of the present.
It’s sad to me you don’t understand this.
