The idea came from flying fighters in the 60's and 70's that had what was called a "zero delay lanyard" that connected the D ring on the chute to the ejection seat. This lanyard was connected before take off and removed above a couple thousand feet, and then reconnected before landing. You didn't want the chute opening immediately at high altitude or high air speeds.

You probably wanted to disconnect it AFTER landing also, lest your immediate charge off the flight line in search of a beer render you a victim of unintended cross-country excursions on a windy day.