Fair. But it's not any "less custodial"  than wallet of Satoshi.
Whoever's operating the mint can rug at any time.
I'm not knocking the tech. (I like and use cashew) It's just not being presented very honestly here.  

 What is the better way to communicate to a non technical user that walletofsatoshi lightning address is tied to 1 company whereas npub.cash can live independently of lightning mode. 

 Probably better to say it's a more private custodial solution