That leaves me with the question, what would be a usecase to unload and later load a wallet? Evt. making a backup while the node is running? Others?
By "closing" or unloading a wallet that you don't want to use, you lessen the odds of using the wrong the wallet/addresses etc.
Those accidents might happen in the GUI with high probability but I think it's hard to make those mistakes in the command line since he need to specify which wallet to use when using
-getnewaddress or
sendtoaddress.
He's talking about the command line and that may be the reason he missed that and came up with that question.
To me, it's looks like he's already answered his question with his follow-up.