Is a monitor color calibrator…

I can’t understand people who spend thousands of dollars on expensive lenses, tripods, memory cards and other accessories but neglect to calibrate their monitors so the colors they are seeing in screen are what the digital values actually stand for. Calibrators can be had for under $100 nowadays, and combination monitor/printer calibrators like the ColorMunki or the PrintFIX Pro go for under $500, there is no reason for any serious photographer not to have one.