Because it removes a thunderbolt port which I could use, whereas I don't need an HDMI port. In the ~18 months I've had it, I've used the HDMI port a grand total

Because it removes a thunderbolt port which I could use, whereas I don't need an HDMI port. In the ~18 months I've had it, I've used the HDMI port a grand total of 0 times.