If you are already getting lofted and dragged when sheeting out, you cannot simply unhook. Thats why the need for quick releases became apparent in the first place!

Hang from a bar in your tree by your harness hook and lets see you unhook by grabbing the chicken loop. It's not possible. I've tried. I tried it while getting dragged into EB with all of my strength. That chicken loop felt like a steel cable... I was not going to budge it.

However you might be able to do it inbetween gusts when there is a moment of slack in the lines.