That may be true. But I did not in any way mention the issue of the name "Jesus" not being in the Psalms. Yes, I have had people bring that up, but after a brief conversation and showing them that Christ ( מָשִׁיחַ / messiah) is specifically mentioned multiple times (whether we translate it that way or not - Psalm 2 comes to mind: "The kings of the earth band themselves, and the Princes are assembled together against the Lord, and against his Christ." v.2, Geneva Bible; see also Psalms 18, 20, 28, 84, 89, 105, 132), along with all the other arguments you already know, they admit that their conscience would not trouble them to sing Psalms instead of hymns, your incredulity aside. I've never understood the "but Jesus isn't mentioned in the Psalms" argument from those who sing uninspired hymns that don't all mention Christ...