why do photos need color correction prior to printing ?

this was the actual image sent to printer, foreground too dark

It was pointed out to me that the image i posted last night had a monitor calibration that I created last night, so it did not lead to the image i printed. This is the image that was sent to the printer, i believe the monitor was calibrated per "canon's" suggestions for a lcd monitor.

any further input, perhaps comparing as well to last nights posting, which was color corrected using PE with elements plus add on , which allows fully manual use of curves. I toyed with the curve briefly last night and created the image posted yesterday. Manual adjustments of a curve are very new to me. thanks , you're feedback has been awesome. Many great points for me to research further and attempt to make changes to my color corrections. Much appreciated.