I think he has lost his phone before and with wallet open that Could be a nice find for a potential thief.
Well if that was what he was thinking, he's an arrogant moron, as unlocking your wallet for staking does not unlock it for spending. Your phone could be stolen and, as long as you did as you should and had created a backup key, you would just download a new wallet and import it.
But, sure, maybe there was some *really* smart reason why he posted his smart-ass answer. I could be wrong, it has happened on occasion.
it's just a personal preference, that's just me. apology if that came off as smart-ass ~ was not the intention