Over Under goal design with slip collar

Why did Vex design the goals with slip collars to hold down to the field? I just watched a tournament where the net pulled up. Retightening that slip collar is time consuming. This is the collar I’m talking about- Screenshot-2023-10-03-085125 hosted at ImgBB — ImgBB
Why didn’t vex just run a bolt thru this joint? This would have given a solid mounting point. The collars don’t clamp down tight enough even when brand new. I predict failures of this joint.