Seriously what does Jacob's ladder even do to Hakari? What stops Hakari, a non reincarnated sorcerer, to just climb JL like Sukuna and Yuji did in 264?

The bum beam has never failed to fail and it's hilarious how much its wanked 😭, people genuinely think Yuta's win con against Hakari is Jacob's ladder but like what does it even do? Hakari can still use his CE just fine inside the ladder so it's not like he's nit fighting back or moving out? He's not reincarnated so it's not like JL is damaging him in any way? And it's not like JL permanently erases a sorcerer's CT, So wtf does it even do that being hit by it suddenly means he loses?