Interesting indeed, they suffer one hull loss and now face banning but other carriers, have a worse record when it comes to hull loss and continue to be acceptable. Double standard??????
Ok, I'll bite.
(And note that I have no info on this and am merely playing "Devil's Advocate")
Maybe it's because there has been other, repeated, breaches of ramp checks, possibly with the same aircraft, over a period of time? After all, enough "black marks" turn into a "red flag". It would have to be over more than just "one hull loss".