That's a different error message tho. If you have a crafting macro running while you're not crafting it says "Only available while crafting".
I like your suggestion, that may be better than completely removing it. What bothers me the most is the sound anyway. While I'm doing hundreds (literally) of HQ synths with my macro I like to watch movies. I either have to pay attention to the screen or put up with the annoying noise of that error message.