Yes, you can certainly use an air gapped laptop as a dedicated hardware wallet.
But now you need to generate a public key to send to someone so you can receive coins. How are you sending that key to your friend? Are you going to read character by character and manually type up the string?
But now you need to generate a public key to send to someone so you can receive coins. How are you sending that key to your friend? Are you going to read character by character and manually type up the string?
It's all tradeoffs.