https://modelrocketbuilding.blogspot.com/search?q=tie+parachute+to+shock+cord
After spending several minutes untangling the shroud lines around a Custom Equinox nose cone, I swore never again.
Another reason I can think of is that with a length of elastic shock cord between the nose cone and parachute there is more give when the chute opens, lessening the chance of the screw eye pulling out.
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