Why do US paratroopers still use round parachutes when the rectangular parachutes have the ability to change direction and even slow the jumper down a bit just before hitting the ground?

How does the use of a round or rectangular parachute impact a jump

Why do paratroopers roll on landing? - Quora

Why do paratroopers use static line parachutes? - Quora

How do soldiers on the ground know if a person descending by parachute is a distressed pilot and not a paratrooper? - Quora

Parachute Malfunctions - Safety

Falling without a Parachute

Is it true that US Airborne troops use people outside of the military to set up their parachutes? - Quora

Why are military parachutes round? - Quora

Do modern US Paratroopers use the 'round' parachute when deploying

Which parachute did you prefer, the T-10 (A-D), MC-6 or T11? Or some other type? If you were MFF qualified, what choices were there? - Quora