This is another reason why centralised wallets sucks, if that ETH address is from trust wallet or meta mask you will only need to add BSC network to your wallet, now only coinbase can help you, when you tell them to stay away from centralised wallets like coinbase they won't listen
He is talking about the exchange not the coinbase wallet, if I am not wrong. So either you hold the coins forever or choose the DEX where there is no liquidity for most coins when you don't want to use centralized exchanges ever.
By the way this thread doesn't need further discussion!