The problem is that CPU power can be used for other uses (is general) and is already heavily centralized. Miners don't have to make a large capital expenditure that force them into mining to recoup their investment. The node problem is ledger size Monero's system expands with use so its harder to keep a full node (cost of ssd, bandwidth latency) If you believe tail emissions good monetary policy and expanding money is good just keep using the dollar. Expands all you want