"Let’s do an experiment to make the VGA signal horizontal blur visible. I plugged my laptop to an LCD monitor with both HDMI and VGA cables and compared the results. This basically simulates a high quality CRT display and low quality VGA cable."

This is so wrong. CRTs have unique properties that can not really be replicated on an LCD monitor. You can get something similar with a really high refresh OLED panel, but that needs to be verified.