I suspect that it is due to emotional reactions against feeling like one is being told what to do. I don’t know what the correlation v. causation is in what comes first (the philosophical attitude leading to such emotional reactions or the emotional attitude making one more likely to accept a libertarian philosophical viewpoint). But given such an emotional reaction, one can easily see people going out of their way to avoid using the terminology that they might feel like they are being told to use.
I suspect that it is due to emotional reactions against feeling like one is being told what to do. I don’t know what the correlation v. causation is in what comes first (the philosophical attitude leading to such emotional reactions or the emotional attitude making one more likely to accept a libertarian philosophical viewpoint). But given such an emotional reaction, one can easily see people going out of their way to avoid using the terminology that they might feel like they are being told to use.