Unfortunately, some people don't agree with the statement. I'm hoping that when written out in such excruciating detail, the argument gets a better chance of finally getting communicated, in those cases where a much more lightweight explanation, such as the one you've cited, doesn't do the trick.

The keyword in the grandparent was "obfuscating." I've done linear programming for half of my life and I couldn't tell that's what you were getting at in the OP.