That's 5 sec of extra healing and DR a drk gets from being in it instead of pulling him out instantly which can mean the diff between killing or forcing valuable lb or drk just standing there and tanking it.

Also makes melee teammates not have to take unneccesary damage by being able to leave the salt.

Everything needs counterplay (although sadly not everything has it), things like this and aformentioned cover are countered by knockbacks/pulls.