@DonielF I am just not aware of cases where the איסור in the context of כלי שמלאכתו לאיסור is one other than Shabbat. And fundamentally, muktzeh is about setting aside “this item isn’t for Shabbat use”. My knives aren’t in that camp because even if I don’t expect on any given Shabbat to pull out my boning knife, if in the midst of Shabbat if I wanted to, I could. Are there examples of prohibiting as muktza an item whose use is forbidden by something other than Shabbat?

@Ze'evwantsSEtodoteshuva I’m unaware of such cases also, which is my biggest problem with his logic.